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Triangular trade

The triangular trade encompassed a network of transatlantic commerce routes linking Europe, Africa, and the Americas from the 16th to the 19th centuries, forming a cyclical exchange driven by European demand for labor-intensive plantation commodities.^[1]^[2] In the initial leg, ships departed from ports in Western Europe, such as Liverpool or Nantes, laden with manufactured goods including textiles, ironware, firearms, and spirits, which were bartered along the West African coast for enslaved Africans procured through intertribal warfare, raids, or judicial sales.^[3]^[4] These human cargoes endured the Middle Passage—a grueling Atlantic crossing marked by overcrowding, disease, and malnutrition, with mortality rates estimated at 10 to 19 percent—before being auctioned in American ports like Charleston or Bridgetown to toil on sugar, tobacco, cotton, or rice plantations.^[5] The final leg returned vessels to Europe carrying raw materials and processed goods such as sugar, molasses, rum, and timber, yielding high profits that fueled mercantile expansion and colonial development.^[6] Over its duration, the system facilitated the forced embarkation of roughly 12 million Africans, with survivors comprising a foundational labor force that underpinned the economic growth of New World colonies and contributed to Europe's early industrialization through capital accumulation and market linkages.^[7]^[8] While economically rational under mercantilist doctrines that prioritized balanced trade and colonial self-sufficiency, the trade's reliance on coerced labor generated profound human costs, demographic disruptions in Africa, and ethical debates that eventually spurred abolitionist movements culminating in its suppression by the mid-19th century.^[9]^[1]

Definition and Historical Context

Origins in Global Commerce

The integration of captives into broader commercial networks traces back to ancient Mediterranean and Afro-Eurasian systems, where multi-directional exchanges of goods and labor foreshadowed later triangular patterns. In the Roman Empire, spanning from the 1st century BCE to the 5th century CE, trade routes connected Europe, North Africa, and the Near East, incorporating slaves sourced from sub-Saharan regions via North African intermediaries alongside commodities like grain, olive oil, and metals; these flows supported economic expansion without a singular oceanic triangle but through iterative legs balancing supply deficits.^[10] Under Islamic expansion from the 7th century onward, trans-Saharan caravans established enduring multi-leg routes linking West African goldfields to North African salt mines and Mediterranean ports, with slaves—often war captives from interior kingdoms—transported northward in exchange for horses, cloth, and weapons, extending further via Indian Ocean dhows to Arabian and Indian markets for spices and textiles.^[11]^[12] These systems, operational by the 8th century, prioritized arbitrage across ecological and resource gradients, integrating human labor as a commodity to sustain imperial economies predating European oceanic ventures.^[13] European adaptations emerged in the 15th century amid the Great Bullion Famine, a monetary crisis from circa 1450 caused by silver outflows to Asian spice markets exceeding local mining yields, prompting searches for alternative precious metal sources.^[14] Portuguese navigators, under Prince Henry the Navigator, initiated coastal West African expeditions from 1415, establishing trading posts like Arguim in 1445 to exchange European copper, cloth, and weapons for gold dust and malagueta pepper from Akan and Wolof intermediaries, alleviating bullion constraints through direct access to sub-Saharan supplies.^[15]^[16] These early ventures evolved from bilateral coastal barters into proto-multi-leg frameworks by incorporating Atlantic island entrepôts, such as Madeira from 1420, where initial slave imports—numbering under 1,000 annually by 1460—supported nascent sugar cultivation demands, driven by European sweetener shortages rather than large-scale plantation enslavement.^[17] Profit imperatives from resource scarcities thus adapted preexisting African exchange logics, prioritizing commodity flows over territorial control and predating the intensified human traffic of subsequent centuries.^[18]

Distinction from Bilateral Trade

Bilateral trade, involving direct exchanges between two regions such as Europe and Africa, frequently resulted in ships returning partially empty or unloaded, as the demand for African commodities like gold or ivory in Europe was insufficient to fill holds on the return voyage, leading to high idle capacity and elevated per-unit shipping costs.^[8] This inefficiency was exacerbated by seasonal wind patterns and ocean currents in the Atlantic, which favored southward and westward routes but made direct northern returns arduous and time-consuming, often requiring detours or prolonged waits for favorable conditions.^[19] In contrast, the triangular system mitigated these issues by structuring voyages to exploit prevailing trade winds and the North Atlantic gyre, enabling continuous cargo loading across three legs and minimizing empty holds.^[20] The emergence of triangular trade thus addressed scalability limitations evident in earlier bilateral models, such as the Portuguese direct trade with West Africa in the 15th century, which relied on low-volume returns and failed to expand without a third node providing high-demand outbound cargo (slaves) and high-volume inbound commodities (plantation products).^[8] By integrating the Americas, the system optimized resource allocation, with specialized routes reducing overall transport costs through full utilization of ship capacity and diversified trade flows that buffered against disruptions in any single leg.^[8] Historical models indicate this configuration boosted equilibrium trade volumes, as British exports to triangular regions rose from negligible shares in 1700 to 60% by 1798, underscoring the economic rationale over point-to-point exchanges.^[8] Risk mitigation further distinguished triangular from bilateral trade, as the multi-leg structure spread exposure across regions and commodities, reducing vulnerability to localized shortages or market fluctuations— for instance, slave trade volumes peaked at around 55,000 annually from 1701 to 1810 without collapsing bilateral dependencies.^[8] This interdependence, while complex, enhanced resilience compared to bilateral routes prone to idle periods and mismatched seasonal availability, fostering sustained profitability in 18th-century Atlantic commerce.^[21]

The Atlantic Triangular Trade System

Outbound Leg: Europe to Africa

The outbound leg of the Atlantic triangular trade system commenced with vessels departing European ports, laden with manufactured and processed goods destined for barter along the West African coast. Portuguese explorers initiated systematic trade contacts in the 1440s, establishing early routes from Europe to African shores initially motivated by quests for gold and spices but soon incorporating human captives.^[22] By the late 17th century, English participation intensified following the 1672 royal charter to the Company of Royal Adventurers Trading into Africa (later the Royal African Company), which held a monopoly on British trade to West Africa and facilitated shipments from ports like Liverpool.^[23] French ports such as Nantes similarly emerged as key departure points, dispatching vessels with comparable cargoes.^[24] Primary commodities included textiles, firearms, metalware (such as iron bars, knives, and brass items), and distilled spirits like rum, which European merchants exchanged for enslaved individuals supplied by coastal African intermediaries.^[6] These goods, often produced in Europe or its colonies, served as currency in African markets, with items like guns enhancing the trade's profitability by fueling local conflicts that increased captive availability.^[25] Ship capacities typically ranged from 100 to 400 tons, allowing for bulk transport of these non-perishable items across the Atlantic, though voyages faced logistical challenges including variable winds and provisioning needs.^[26] Crew mortality on this leg was significant, driven primarily by infectious diseases such as fevers—likely malaria—contracted upon nearing African waters, with over three-quarters of fatalities occurring in the initial weeks due to exposure and inadequate medical knowledge.^[27] Annual crew death rates could exceed those of subsequent passages, underscoring the environmental hazards of tropical coasts despite the absence of human cargo during outbound transit.^[28] This phase initiated the trade cycle by leveraging Europe's industrial output to acquire labor for American plantations, generating asymmetric value extraction through goods undervalued in origin but prized in destination markets.^[29]

Middle Passage: Africa to the Americas

The Middle Passage encompassed the transatlantic voyage of enslaved Africans from embarkation points along the African coast, primarily spanning Senegambia in the north to Angola in the south, to principal destinations in the Americas including the Caribbean islands, Brazil, and mainland colonies.^[30] These routes leveraged prevailing winds and currents, such as the North Atlantic trade winds for northern departures and the South Equatorial Current for southern ones, with voyages originating from over 50 African ports documented in records of approximately 36,000 transatlantic slave ships.^[31] The crossing typically lasted just over two months on average across all African regions, though durations varied from one to six months depending on weather, ship speed, and navigational decisions.^[29] ^[32] Slave ships were increasingly purpose-built after 1700 to optimize for human cargo transport, featuring reinforced lower decks with platforms for tiered stowage and iron shackles to secure captives in supine or seated positions, thereby maximizing capacity in terms of "heads per ton" of ship tonnage.^[33] Prior to British regulatory efforts, packing densities often exceeded 2-3 slaves per ton, with vessels like the Brookes diagrammed to hold up to 454 individuals on a 267-ton ship under later limits, though actual pre-regulation loads were denser to boost profitability.^[34] The 1788 Dolben Act imposed British limits of 1.67 slaves per ton for ships under 207 tons burthen, reducing but not eliminating overcrowding that facilitated disease transmission.^[35] Mortality during the Middle Passage averaged 12.1% across documented voyages, with rates ranging from 9% in less crowded regional trades to over 19% in high-risk areas, primarily due to dysentery, scurvy, and respiratory infections exacerbated by confinement, poor ventilation, and contaminated water supplies rather than deliberate violence alone.^[31] Overall, of the 12.5 million Africans embarked between 1501 and 1866, approximately 1.8 million perished en route, based on embarkation and disembarkation records.^[30] A notable case illustrating logistical pressures and property valuation occurred in 1781 aboard the Zong, a 110-ton British vessel that departed from Accra with 440 enslaved Africans; due to a navigational error extending the voyage and depleting provisions, the crew jettisoned 132 individuals over 10-13 days to claim insurance losses, treating the act as permissible disposal of cargo under maritime law rather than homicide, with owners prevailing in an initial London court ruling on the insurance dispute.^[36] ^[37]

Return Leg: Americas to Europe

Ships departing American and Caribbean ports on the return leg carried raw commodities extracted from slave-based plantations, including sugar, tobacco, molasses, rice, indigo, and cotton, which were shipped to Europe for processing and sale.^[1]^[38] Sugar dominated exports from Caribbean islands like Barbados and Jamaica, where enslaved labor enabled large-scale monoculture production on estates averaging hundreds of acres.^[1] By 1750, almost 90 percent of sugar consumed in Britain originated from these West Indian slave plantations, underscoring the efficiency of coerced labor in yielding high-volume cash crops for export.^[39] Tobacco, grown primarily in Virginia and Maryland using similar plantation systems, constituted another key cargo, with over 145,000 enslaved workers supporting production by mid-century.^[40] Southern ports such as Charleston, South Carolina, facilitated exports of rice and indigo from coastal plantations, while Caribbean hubs like Barbados loaded sugar and molasses hogsheads.^[41]^[42] To counter outbound ballast shortages and maximize hold capacity, vessels from northern colonies incorporated timber for shipbuilding and furs, integrating North American resources into the circuit.^[38] These cargoes exploited plantation efficiencies, where gang-based slave labor systems optimized raw material output through relentless field work and minimal overhead, generating surpluses that closed the trade loop upon arrival in European ports like Liverpool and Bristol.^[1]^[43]

Key Participants and Their Incentives

European Merchants and Nations

Portugal initiated systematic participation in the Atlantic slave trade in the late 15th century, establishing trading posts along the West African coast and transporting enslaved Africans to its colonies in Brazil and elsewhere, thereby laying the groundwork for the triangular system's European involvement.^[5] Britain entered the trade in the mid-16th century, with naval commander John Hawkins leading the first English voyages in 1562–1563, capturing or purchasing around 300 enslaved Africans off Guinea and selling them in Spanish Caribbean ports despite prohibitions under Spanish monopoly.^[44] Hawkins conducted two additional expeditions in 1564 and 1567–1568, profiting from direct sales to colonial settlers and establishing a model for English merchants.^[45] By the 18th century, Britain had become the dominant power, transporting approximately 3.1 million enslaved Africans between 1640 and 1807, accounting for over half of the trade's volume during that period alongside Portugal's earlier lead.^[25] France also played a significant role, establishing colonies in the Caribbean and mainland North America that relied on imported labor, with state-supported companies facilitating voyages under mercantilist frameworks.^[46] Key enterprises included Britain's South Sea Company, chartered in 1711 and awarded the Asiento de Negros in 1713 via the Treaty of Utrecht, granting it a 30-year monopoly to supply up to 4,800 enslaved Africans annually to Spanish American colonies, which it fulfilled by transporting over 75,000 individuals by mid-century.^[47]^[48] These nations pursued triangular trade through mercantilist policies designed to maximize national wealth via bullion accumulation, granting royal charters, monopolies, and subsidies to joint-stock companies that offset voyage risks and ensured returns from colonial raw materials like sugar and tobacco exchanged for manufactured goods and slaves.^[49] Governments prioritized state-backed enterprises to control trade flows, directing profits from American commodities back to Europe to bolster treasuries and fund naval expansion, with private merchants operating under licensed frameworks that aligned individual incentives with imperial goals.

African Suppliers and Political Structures

The Ashanti Empire, centered in present-day Ghana, actively participated in the transatlantic slave trade by conducting raids and wars against neighboring groups, capturing prisoners who were then sold to European traders at coastal forts like Cape Coast Castle.^[50] These captives, primarily adult males and females taken in military conflicts, formed the bulk of exports from the Gold Coast region, with the empire's rulers using proceeds to consolidate power and expand territory from the late 17th century onward.^[51] Similarly, the Kingdom of Dahomey, under kings like Agaja (r. 1718–1740), waged targeted campaigns against inland polities such as the Mahi and Yoruba to procure war prisoners, who constituted the primary source of slaves funneled through ports like Ouidah.^[52] A key dynamic sustaining these operations was the "guns-for-slaves" exchange, wherein European merchants traded firearms, gunpowder, and other arms for captives, enabling supplier kingdoms to militarize further and intensify raids.^[53] By the 18th century, this cycle had escalated, with African polities importing thousands of guns annually—such as ratios rising from 2 guns per slave in 1682 to 24–32 by 1718—which bolstered their coercive capacities and perpetuated endogenous conflict for human commodities.^[54] In Dahomey, this armament supported the kingdom's "annual customs," ritual executions of captives that demonstrated royal authority while reserving healthier prisoners for export, thereby intertwining internal political rituals with Atlantic commerce.^[55] Ouidah emerged as a pivotal hub under Dahomey's control after its conquest in 1727, serving as the kingdom's primary outlet for over one million slaves shipped to the Americas, particularly Brazil, from the 17th to 19th centuries.^[56] African elites at these ports negotiated directly with European factors, prioritizing prime captives—often war prisoners over debtors or criminals—to maximize barter value in goods like iron bars and textiles.^[52] Political structures in these kingdoms incentivized continuity of the trade, with rulers deriving revenue and legitimacy from it; for instance, Dahomey's monarchy resisted British abolitionist pressures in the early 19th century, rejecting treaties that curtailed exports and instead petitioning for alternative commodities to sustain fiscal stability.^[55] Ashanti leaders similarly prioritized trade alliances with multiple European powers to evade suppression efforts, viewing the influx of slaves as essential to their hierarchical systems where captives underpinned labor, tribute, and military service.^[50] This endogenous profiteering, rooted in pre-existing warfare practices amplified by Atlantic demand, underscores how African polities adapted internal power dynamics to the global market rather than being passive suppliers.^[57]

American Planters and Colonial Economies

American planters in the colonial Americas, particularly in the Caribbean and southern mainland regions, drove significant demand for enslaved African labor to sustain plantation-based economies centered on labor-intensive cash crops. Sugar production in the British, French, and Dutch Caribbean islands required vast workforces for planting, harvesting, and processing, with high mortality rates—often resulting in life expectancies of 5 to 10 years for enslaved workers due to overwork, malnutrition, disease, and brutal conditions—necessitating continuous importation to replace losses.^[58]^[59] Tobacco cultivation in Virginia similarly expanded reliance on enslaved labor as plantations grew after the mid-17th century, with the crop's labor demands shifting from initial indentured servants to lifelong chattel slavery to meet rising export needs and maintain profitability.^[60] Brazil, under Portuguese control, absorbed approximately 40% of all transatlantic enslaved Africans, primarily for sugar and later coffee plantations, underscoring the scale of demand in tropical export agriculture.^[61] The preference for enslaved African labor over European indentured servitude intensified after the 1680s, as indentured contracts typically lasted 4–7 years, after which servants gained freedom and land, leading to labor shortages and social tensions like Bacon's Rebellion in Virginia (1676), which heightened planters' fears of arming poor whites. Enslaved Africans provided perpetual, heritable labor at lower long-term costs, especially in disease-prone tropical environments where Europeans suffered higher mortality from malaria and yellow fever, rendering them less viable for sustained plantation work.^[62] This economic calculus was reinforced by the availability of slaves through the triangular trade, making African labor a more reliable input for high-yield crops like sugar, which demanded year-round gang labor systems unsuited to temporary servitude.^[63] Colonial legislatures formalized these incentives through slave codes that entrenched perpetual slavery, denying basic rights and classifying enslaved people as property. The Barbados Slave Code of 1661, the first comprehensive English colonial law on the matter, legalized lifelong enslavement for Africans and their descendants, prohibited manumission without assembly approval, and authorized harsh punishments to suppress resistance, setting a model adopted in Jamaica (1664) and other Caribbean islands.^[64]^[65] These measures aligned planter interests with imperial trade networks, ensuring a stable labor supply for export-oriented economies while prioritizing crop output over worker welfare.

Economic Dynamics and Goods Exchanged

Commodities and Profit Mechanisms

European merchants exported commodities such as iron bars, firearms, textiles, and cowrie shells to West African ports, where these items served as barter goods for enslaved Africans. Iron bars, often termed "voyage iron," functioned as a standardized unit of exchange value, with historical records indicating that a single enslaved person might equate to approximately 85 bars in trade valuations during the 18th century.^[66]^[67] Cowrie shells, sourced primarily from the Indian Ocean via European intermediaries, became a de facto currency in West African economies, facilitating the acquisition of captives by embodying portable and divisible value that local societies lacked in sufficient quantities.^[68]^[69] On the return leg from the Americas to Europe, ships carried plantation-produced staples including sugar, molasses, tobacco, rice, and increasingly cotton, which generated profits through their transformation and resale in European markets. Molasses, a byproduct of sugar refining in the Caribbean, was shipped to New England distilleries for conversion into rum, a distilled spirit that fetched premium prices when re-exported to Africa, creating a value-adding loop within the trade cycle.^[70]^[19] The invention of Eli Whitney's cotton gin in 1793 mechanized seed removal, dramatically boosting cotton yields and elevating it as a high-value return commodity; U.S. cotton exports surged from about 1,500 bales in 1790 to over 4 million by 1860, amplifying trade volumes and margins on this leg.^[71]^[72] Profit mechanisms relied on barter asymmetries, where European goods held disproportionate value in African markets due to technological and resource scarcities—such as the demand for durable iron tools and exotic shells absent in local production—allowing traders to acquire human cargo at low relative cost before realizing multiples upon sale in the Americas.^[67]^[66] Credit instruments like bills of exchange further enabled profits by deferring payments; drawn on London or other financial centers, these negotiable orders allowed American planters to settle slave purchases with promises backed by future commodity exports, reducing immediate capital outlays and mitigating transatlantic risks.^[73]^[74] Historical ledger analyses of British voyages estimate average net profits of around 17% per trip for ports like Bristol and Liverpool in the late 18th century, driven by these commodity markups and financing efficiencies rather than uniform high returns across all ventures.^[75]

Labor Economics and Plantation Systems

In the plantation economies reliant on the triangular trade, enslaved African labor served as a capital investment yielding high returns through intensive cultivation of cash crops like sugar cane, which demanded synchronized, year-round exertion unsuitable for seasonal free labor patterns. Prime field hands were purchased upon arrival in the Americas for £20 to £50, reflecting costs that included transatlantic transport and initial outfitting, with recoupment achieved via output exceeding £200 in equivalent sugar value over a typical working lifespan of 10-20 years, driven by coerced productivity unburdened by wage negotiations.^[76]^[77] The gang labor system amplified these efficiencies by dividing plantation work into standardized tasks performed collectively under direct oversight, enabling large-scale operations to surpass the output of smaller free farms or indentured arrangements, where individual incentives fragmented effort and coordination.^[78]^[79] Comparative accounting in the antebellum period, applicable to earlier colonial precedents, indicated slave hire rates 35-75% below free labor equivalents when adjusted for subsistence and supervision, with no convergence toward parity over time.^[80] Biological factors further tilted economics toward enslavement: African laborers' partial immunity to tropical maladies like malaria—conferred by genetic traits such as sickle-cell heterozygosity—minimized productivity losses from illness, contrasting with European free workers' vulnerability, which inflated effective labor costs through higher absenteeism and replacement needs in humid, mosquito-prevalent regions.^[81] Alexander Hamilton's 1791 Report on Manufactures implicitly acknowledged this entrenchment by advocating industrial diversification to supplant agrarian dependence, noting unproven viability of free-labor substitutes for sustaining plantation-scale yields in disease-prone staples without systemic restructuring.^[82]

Scale, Routes, and Quantitative Data

Estimated Volumes and Timelines

The transatlantic slave trade, the human cargo leg of the triangular trade, involved the forced embarkation of an estimated 12.5 million Africans from 1501 to 1866, with these figures derived from the Trans-Atlantic Slave Trade Database through compilation of voyage records and statistical imputation for undocumented voyages.^[30] The database, drawing on over 36,000 documented voyages covering 66–80% of the total, adjusts for underreporting via extrapolative methods to arrive at aggregate estimates, though some scholars note potential variances due to incomplete African-side records.^[83] Trade volumes remained modest in the initial phase, accelerating sharply in the 18th century amid expanding plantation demands in the Americas. By century, embarkations totaled approximately 277,500 in the 16th (1501–1600), dominated by Portuguese carriers supplying early Iberian colonies; 1.88 million in the 17th (1601–1700), with Portuguese maintaining primacy alongside emerging Dutch (totaling around 500,000 over their active period, chiefly this century) and initial British participation; 6.49 million in the 18th (1701–1800), the peak era where British vessels accounted for over 3 million amid intensified competition from France and the Netherlands; and 3.87 million in the 19th (1801–1866), sustained largely by Portuguese/Brazilian and Spanish/Cuban operations despite abolitionist pressures in northern Europe.^[30] Portuguese/Brazilian flags overall transported about 5.85 million, underscoring their long-term dominance from the 16th through 19th centuries.^[30] These timelines reflect causal drivers like colonial expansion and commodity booms, with volumes calibrated against primary logs, port manifests, and planter import data.^[30]

Mortality Rates and Logistical Challenges

Mortality rates on the Middle Passage averaged 12 to 15 percent of embarked enslaved Africans, with rates exceeding 20 percent common under tight-packing practices that prioritized ship capacity over space allocation.^[33]^[84] These figures reflected logistical risks inherent to overcrowding, where enslaved individuals were confined in holds with minimal air circulation and sanitation, fostering rapid spread of diseases like dysentery—often from contaminated water and waste accumulation—rather than systematic killing for its own sake.^[85] Merchants treated such losses as calculable business costs, factoring them into pricing and insurance to maintain profitability amid voyages averaging 40 to 60 days across variable Atlantic currents and weather.^[86] Across the trade's span from the 1500s to 1860s, approximately 1.8 million deaths occurred at sea out of 12.5 million embarked, excluding additional losses during overland marches to African ports (estimated at 10-15 percent) and post-arrival "seasoning" in the Americas due to unfamiliar diseases and labor demands.^[86]^[87] Logistical hurdles included provisioning for extended routes, crew vulnerabilities to the same pathogens (with sailor mortality around 15-20 percent), and occasional shipwrecks or mutinies that amplified attrition.^[28] The 1788 Dolben Act for British ships addressed these issues by capping slaves at 1.67 per ton (up to 207 tons) and requiring onboard surgeons and ventilation gratings, yielding slight mortality reductions—from about 13 percent pre-act to under 10 percent in the 1790s—primarily through moderated crowding that curbed disease vectors, though overall trends also reflected improved ship design and experience.^[28]^[88]

Comparisons with Other Historical Slave Trades

Intra-African and Arab Slave Trades

The intra-African slave trade encompassed the internal capture, trade, and use of enslaved persons within African societies long before the advent of transatlantic commerce, with systems embedded in kingdoms such as Mali, Songhai, and later Dahomey and Ashanti. These practices involved warfare, raids, and judicial punishments yielding captives for agricultural labor, military service, domestic work, and concubinage, often integrated into kinship-like structures but marked by hereditary bondage and sale across regions. Estimates suggest millions were enslaved internally over centuries, sustaining local economies without external export focus until later intensification.^[89]^[90] The Arab slave trade, particularly via trans-Saharan routes from sub-Saharan Africa to North Africa and the Islamic world, operated from approximately 650 to 1900 CE, with historians estimating 7 to 9 million slaves transported northward, representing a significant pre-colonial export system. African polities, including those in the Sahel, supplied captives through raids and tribute, while Arab and Berber merchants facilitated caravans enduring harsh desert crossings with high mortality. Distinct features included the systematic castration of many male slaves to produce eunuchs for palace guards, administrators, and harems—often performed by non-Muslims to circumvent Islamic prohibitions—with survival rates as low as 10-20% due to the procedure's brutality; female slaves, conversely, were commonly destined for domestic service or concubinage.^[91]^[92]^[93] Continuity between intra-African and Arab trades is evident in shared mechanisms of supply from African kingdoms, which both utilized and profited from enslavement practices predating European involvement. Traveler Ibn Battuta, in his 1350s account of the Mali Empire, described bustling slave markets in towns like Walata and Gao, where female slaves dominated sales of goods and millet, often appearing unveiled and integrated into daily commerce, underscoring the normalized presence of bondage in urban centers. These systems highlight endogenous African agency in slave procurement, with rulers like those of Mali employing slaves in courts and armies while exporting others northward, fostering economic ties across the Sahara.^[94]^[95]

East African vs. Transatlantic Routes

The East African slave trade operated primarily across the Indian Ocean, sourcing captives from interior regions of present-day Tanzania, Mozambique, and Malawi, who were marched overland to coastal ports like Zanzibar, Bagamoyo, and Kilwa before shorter maritime voyages to destinations in the Arabian Peninsula, Persian Gulf, and western India.^[96] Zanzibar emerged as the central hub in the 19th century under Omani Arab control, following Sultan Seyyid Said's relocation of his capital there in 1840, facilitating exports driven by demand for domestic laborers, concubines, soldiers, and eunuchs rather than large-scale plantation agriculture.^[97] Scholarly estimates indicate 1.5 to 2.1 million slaves were exported through East African ports during the heightened 19th-century phase, with overall Indian Ocean volumes from eastern Africa totaling around four million captives from the 8th to 19th centuries, though net exports were lower due to pre-embarkation losses.^[98] ^[99] In contrast to the transatlantic trade's long oceanic crossings from West and Central African coasts to the Americas—spanning 5,000 to 6,000 miles with Middle Passage mortality of 10-15%—the East African routes featured grueling inland treks of 200-500 miles, where mortality approached 80% from exhaustion, disease, and violence before slaves reached the coast for embarkation.^[100] ^[84] Sea voyages were comparatively brief (often under 1,000 miles to Arabia), reducing shipboard deaths but not compensating for terrestrial hardships exacerbated by desert crossings and chained marches.^[97] Economically, the East African trade emphasized diversified uses in urban households and harems, yielding higher female proportions (often 50-60% of exports), which elevated local male-to-female ratios in source regions, whereas the transatlantic trade prioritized male field labor, exporting two males per female and skewing demographics toward surplus women in West Africa.^[101] ^[102] Omani Arabs dominated the 19th-century East African trade, expanding clove plantations on Zanzibar and Pemba that absorbed tens of thousands annually while exporting to Ottoman and Persian markets, a system less industrialized than European transatlantic operations reliant on fortified coastal factories and credit networks.^[103] The trade persisted empirically beyond transatlantic suppressions—British abolition in 1807 and U.S. bans in 1808—peaking in the mid-1800s with up to 50,000 exports yearly from Zanzibar, only waning after British naval interventions and the 1873 closure of the island's open market, with clandestine routes enduring until the 1890s under international pressure.^[104] This longevity reflected weaker enforcement in the Indian Ocean compared to Atlantic patrols, underscoring geographic isolation and entrenched Arab commercial interests.^[97]

Consequences and Long-Term Effects

Economic Gains for Europe and the Americas

The triangular trade generated substantial profits for European merchants and shippers through the export of manufactured goods to Africa, the transport of enslaved Africans to the Americas, and the return of plantation commodities like sugar, tobacco, and cotton to Europe. In Britain, these activities particularly transformed port cities; Liverpool, for instance, dispatched 217 slaving vessels between 1741 and 1750, comprising 43% of all British slave-trading ships during that decade, and by the 1790s dominated 80% of the British slave trade while handling over 40% of Europe's total.^[105]^[106] The port's commercial volume surged, with imports rising from 14,600 tons in 1709 to 450,000 tons by 1800, fueling urban expansion and infrastructure development tied directly to trade revenues.^[107] Overall, slave-based plantation exports added under 2.5% to Britain's national economy at their late-18th-century peak, a share comparable to domestic sheep farming but concentrated in key sectors like shipping and mercantile finance.^[108] Direct profits from slave trading itself averaged around 0.5% of GDP, though broader slavery-linked wealth from colonial produce amplified local impacts, raising manufacturing employment and property values in trade-adjacent regions.^[109] These returns were channeled into industrial advancements, including textile mills processing imported cotton and improvements in shipping technologies that lowered costs and expanded trade capacity during the early Industrial Revolution.^[110] In the Americas, the trade's labor inputs underpinned export-driven plantation economies, creating wealth multipliers via high-yield cash crops that integrated colonies into global markets. Enslaved workers produced commodities accounting for roughly 12.6% of U.S. GDP on the eve of the Civil War, with cotton—harvested almost exclusively by slaves—constituting over 50% of national exports by 1860 and driving Southern regional growth.^[111] Southern agricultural productivity benefited from slave labor efficiencies, including selective breeding and gang systems that boosted cotton output per worker beyond many free-labor benchmarks, sustaining elite fortunes and capital accumulation in staples like sugar and tobacco across Caribbean and mainland holdings.^[112] This system generated reinvestable surpluses, funding local infrastructure such as levees and warehouses that enhanced export logistics and commodity values.

Developmental Impacts on Africa

The transatlantic slave trade exported approximately 12 million Africans from 1500 to 1866, with additional millions through other routes including the trans-Saharan and Indian Ocean trades, leading to severe demographic disruptions in West and Central Africa.^[7] This population drain, estimated at up to 20% in some regions during peak periods, reduced labor availability for agriculture and local production, fostering chronic insecurity as communities prioritized defense against raids over economic development.^[113] Empirical analysis indicates that areas more intensely affected exhibited heightened ethnic fractionalization, as slave raids incentivized inter-group conflict and mistrust, undermining cooperative institutions essential for growth.^[114] Econometric studies link slave export intensity to persistent underdevelopment, with Nathan Nunn's 2008 research showing a robust negative correlation between per-country slave exports and contemporary GDP per capita, explaining roughly 72% of Africa's income shortfall relative to the global average absent the trades.^[115] The trade distorted incentives, diverting resources toward slave capture and warfare rather than infrastructure or innovation, while depopulating prime agricultural zones and perpetuating a cycle of violence that hindered state formation and market integration.^[116] However, internal African dynamics, including pre-existing systems of enslavement and warfare among kingdoms, amplified these effects, as elites in states like Dahomey and Asante actively participated to acquire European goods.^[117] Some coastal polities experienced short-term gains from the trade, accumulating wealth through exports of slaves in exchange for firearms, textiles, and metals, which bolstered military capacity and territorial expansion.^[7] The "guns-for-slaves" exchange, documented from the 17th century onward, enabled kingdoms such as Oyo and Dahomey to dominate interior rivals, temporarily enriching ruling classes and fostering specialized port economies.^[117] Yet these benefits were uneven and fleeting; firearm proliferation escalated endemic warfare, further entrenching predatory governance over productive investment, with net developmental costs outweighing localized windfalls.^[118] Long-term stagnation in Africa cannot be attributed solely to the slave trades, as biogeographic factors like the tsetse fly's inhibition of animal husbandry and draft power, alongside tropical disease burdens such as malaria, constrained pre-colonial intensification of agriculture and trade networks independently.^[119] Rugged terrain in some areas inadvertently shielded populations from raids, mitigating but not eliminating trade-induced harms, while geographic fragmentation limited scalable economic systems prior to European contact.^[120] Nonetheless, the unprecedented scale of external slave extraction exacerbated these vulnerabilities, entrenching mistrust and weak institutions that impeded post-trade recovery.^[121]

Human Costs to Enslaved Populations

The transatlantic slave trade inflicted profound physical and psychological suffering on enslaved Africans, beginning with the Middle Passage, where captives endured extreme overcrowding, inadequate food and water, rampant disease, and brutal discipline, leading to mortality rates of 10 to 15 percent across approximately 36,000 documented voyages from 1514 to 1866.^[30]^[84] Out of an estimated 12.5 million Africans embarked, roughly 1.8 million perished en route, with causes including dysentery, scurvy, and suicide; crew mortality was also high at over 20 percent in some periods due to similar hardships.^[33]^[30] Upon disembarkation, survivors faced a "seasoning" phase of acclimation to New World diseases and labor regimes, during which death rates remained elevated, compounded by malnutrition and exhaustion; combined with Middle Passage losses, approximately 2 million Africans died during transit or in the first year of enslavement.^[122] In Caribbean sugar plantations, newly arrived enslaved adults typically survived only 7 to 10 years post-arrival owing to relentless field labor from dawn to dusk, exposure to tropical fevers like malaria and yellow fever, and deficient diets heavy in salted fish and molasses but lacking protein.^[58]^[123] Plantation owners often replenished workforces via continuous imports rather than natural increase, as infant mortality exceeded 50 percent and birth rates lagged due to these stressors.^[58] Family units were systematically fractured, with captives captured and sold individually or in small groups, severing African kinship networks; auctions in the Americas further dispersed spouses, parents, and children, as slaveholders prioritized economic utility over familial integrity, leaving many to form improvised bonds under perpetual threat of resale.^[124]^[125] This practice persisted across regions, though documentation from plantation records indicates it was near-universal in chattel systems treating humans as commodities.^[124] Enslaved Africans mounted resistance through flight and insurgency, including maroonage—escape to form autonomous communities in inaccessible terrains like Jamaican mountains or Brazilian hinterlands, where runaways sustained themselves via subsistence farming and raids while evading recapture.^[126]^[127] Collective revolts also occurred, exemplified by the uprising in Saint-Domingue starting August 1791, where tens of thousands of enslaved field workers burned plantations and clashed with colonial forces, escalating into a prolonged war that dismantled slavery there by 1804.^[128] Such actions imposed tactical costs on enslavers, though most were suppressed with lethal force. Regional disparities moderated some human costs; in Brazil, which received nearly 40 percent of transatlantic arrivals, manumission—formal freedom grants by owners or self-purchase—was more frequent than in British Caribbean colonies, averaging 1-2 percent annually in urban centers like Bahia due to Portuguese legal traditions, Catholic incentives for manumitting the faithful, and enslaved access to cash from skilled labor or petty trading.^[129]^[130] This contrasted with Caribbean islands, where plantation isolation and Protestant doctrines yielded negligible manumissions, perpetuating total enslavement for generations.^[129]

Scholarly Debates and Controversies

Role in Capitalist Development

Eric Williams posited in Capitalism and Slavery (1944) that profits from the triangular trade, encompassing the export of manufactured goods to Africa, the purchase of enslaved Africans, and the importation of plantation commodities like sugar and cotton to Europe, generated surplus capital essential for Britain's Industrial Revolution, with reinvestments funding infrastructure such as canals and factories.^[131] Proponents of this view highlight specific institutional origins, noting that firms like Lloyd's of London emerged from insuring slave voyages in the late 17th century, while profits seeded early banks and joint-stock companies involved in Atlantic commerce, providing liquidity for mercantile expansion.^[132] These contributions extended to broader financial innovations, as slave traders' wealth supported credit mechanisms that facilitated domestic investment.^[109] Subsequent quantitative critiques have substantially qualified Williams' causal claims, demonstrating that direct slave trade profits represented only about 1-2% of Britain's total fixed capital formation during the 18th century's peak, insufficient to drive systemic industrialization when compared to sectors like agriculture or textiles.^[133] Economic historians, including Stanley Engerman and David Richardson, have shown through customs data and profit reconstructions that the trade's net returns, after accounting for high mortality and overheads, averaged under 0.5% of national income annually from 1760-1807, dwarfed by internal commerce and enclosures.^[43] The Williams thesis has been further undermined by evidence of comparable growth in non-slave-dependent ports; for instance, Hull, focused on Baltic timber and agricultural exports, expanded its trade volume at rates rivaling Bristol's during the 1750s-1790s, while inland industrial hubs like Manchester and Birmingham thrived on domestic markets and non-Atlantic imports without direct triangular trade linkages.^[134]^[135] Recent scholarship in the 2020s reinforces that viable alternatives to slave trade capital existed, with analyses from economic history databases indicating that domestic wool, coal, and pottery sectors supplied comparable or greater investment flows for mechanization, rendering the triangular trade accelerative at best rather than foundational to capitalist structures.^[136] Platforms like EH.net highlight how pre-existing market institutions and technological spillovers from non-colonial trades—such as ironworking—sustained growth trajectories independent of Atlantic slavery, countering exaggerated legacy attributions by emphasizing diversified revenue streams in Britain's mercantile economy.^[132] These findings underscore that while the trade enriched specific merchant classes, broader capitalist development relied on endogenous factors like property rights evolution and innovation incentives, not exogenous windfalls from human trafficking.^[137]

Critiques of Exaggerated Legacy Claims

Scholars such as Daron Acemoglu, James Robinson, and Simon Johnson argue that Africa's persistent underdevelopment cannot be causally attributed primarily to the transatlantic slave trade, as institutional quality—particularly the presence of inclusive versus extractive political and economic institutions—better explains cross-national differences in prosperity.^[138] Their analysis of former colonies indicates that geographic endowments and historical events like slavery exert influence mainly through their effects on institutional persistence, with post-colonial governance failures amplifying any prior disruptions rather than the trade itself serving as a direct, enduring barrier to growth.^[139] This framework challenges deterministic narratives by highlighting how correlation between slave export intensity and modern GDP per capita does not imply causation, as omitted variables like state capacity and rule of law account for more variance.^[140] Economic trajectories post-abolition further underscore multifaceted causation, with the Americas—despite reliance on transatlantic slavery—achieving industrialization and sustained growth after 1800, while sub-Saharan Africa lagged due to internal factors including continued intra-African enslavement and weak property rights.^[141] For instance, U.S. economic expansion in the 19th century proceeded without acceleration from slavery, as Southern underinvestment in infrastructure and immigration aversion constrained broader development, yet overall hemispheric progress outstripped Africa's amid colonial extraction and post-independence mismanagement.^[142] Economists like Patrick Manning note that while Atlantic exports disrupted West and Central Africa from 1700 to 1870, continental slavery systems persisted, concentrating elite wealth without fostering innovation, a pattern exacerbated by geography and conflict rather than trade legacies alone.^[143] Critiques also highlight how popular accounts overstate the trade's uniqueness, ignoring slavery's status as a near-universal pre-modern institution involving African rulers, Arab traders, and Asian empires, which diminishes claims of singular Western moral culpability.^[144] Thomas Sowell observes that African societies actively participated in capturing and selling slaves to Europeans, mirroring global norms where enslavement targeted out-groups irrespective of race, and that such practices predated and outlasted transatlantic routes without inducing equivalent guilt narratives elsewhere.^[145] Institutional biases in academia and media, often aligned with progressive ideologies, selectively amplify the trade's role to frame Western history as exceptionally culpable, sidelining evidence of comparable Arab enslavement of 17 million Africans over centuries or Ottoman systems, thereby distorting causal realism in favor of ideological narratives.^[146]^[147]

Abolition and Transition to Other Trades

Factors Leading to Suppression

The suppression of the transatlantic slave trade was driven in part by economic pressures that eroded its profitability, including sharply rising slave prices at African ports due to intensified interception risks and reduced supply volumes following British abolition in 1807.^[29] Traders faced elevated costs from higher insurance premiums, faster but more expensive vessels to evade patrols, and disrupted coastal access, which collectively diminished returns on voyages even as demand persisted in Brazil and Cuba.^[148] In parallel, alternatives such as indentured labor from Asia emerged as cheaper options for some plantation economies post-suppression, further undercutting the economic rationale for continued illicit trafficking.^[149] British naval enforcement played a pivotal role, with the West Africa Squadron—operational from 1808 to the 1860s—patrolling approximately 3,000 miles of coastline and seizing over 1,600 slave ships, thereby freeing around 150,000 captives.^[150] These operations, supported by bases like Sierra Leone, imposed direct financial burdens on Britain, costing up to 2% of national GDP at peak and straining resources through ship maintenance, personnel losses (over 1,500 sailors died, mostly from disease), and judicial proceedings for captured vessels.^[150] The colony of Sierra Leone, established as a hub for liberated Africans and anti-slave-trade courts, incurred substantial ongoing expenses for settlement, defense, and administration, which compounded the fiscal incentives for Britain to prioritize suppression amid competing imperial demands.^[151] African suppliers and traders adapted through resistance tactics, such as relocating capture and embarkation points deeper inland via overland routes to circumvent coastal patrols, which temporarily sustained illegal flows but increased logistical costs and vulnerabilities to local conflicts.^[152] Nonetheless, these evasions proved insufficient against sustained naval pressure and bilateral treaties, as the cumulative economic disincentives—higher per-slave acquisition expenses and seizure probabilities—gradually outweighed potential profits, contributing to a net decline in transatlantic volumes by the mid-19th century.^[153]

Post-Abolition Economic Shifts

Following the abolition of the British slave trade in 1807 and emancipation in 1833, European powers, particularly Britain, promoted "legitimate commerce" in West Africa to replace slave exports with commodities such as palm oil and ivory, aiming to sustain triangular trade patterns through exchanges of manufactured goods from Europe for raw materials shipped back for industrial processing.^[154] Palm oil exports from regions like the Niger Delta surged from negligible volumes before 1800 to over 30,000 tons annually by the 1840s, facilitating a cycle where British textiles and metalware were traded for oil used in soap, lubricants, and candles in Europe and the Americas.^[155] This shift, however, was gradual and incomplete; legitimate trade coexisted with slavery, as African intermediaries often relied on enslaved labor for palm oil production, exporting both oil from Calabar and slaves until at least the 1850s.^[156] Ivory trade followed a similar logic, with British demand driving exports from coastal entrepôts like Sierra Leone, where goods flowed inward and tusks outward, though volumes remained secondary to palm oil at around 10-15% of commodity value until the 1870s.^[157] Despite legal bans, the illicit slave trade persisted in a modified triangular framework, with European and American vessels evading patrols to transport over 1.65 million Africans across the Atlantic to Brazil and Cuba between 1808 and 1867, sustaining plantation economies in sugar and coffee.^[30] Brazil received the bulk, with imports peaking at approximately 250,000 slaves in the 1840s alone under Portuguese-flagged ships, before a British naval blockade and 1850 prohibition law curtailed flows, though smuggling continued sporadically until full abolition in 1888.^[158] In Cuba, illegal landings escalated post-1820 treaty bans, with 80 ships documented in 1835 carrying roughly 24,000 slaves under false flags, fueling a slave population growth from 286,000 in 1827 to 370,000 by 1862 despite nominal Spanish suppression efforts.^[159] These clandestine operations mirrored pre-abolition routes, exchanging rum, textiles, and iron for human cargoes funneled to New World markets. Broader adaptations echoed triangular coercion in other coerced exchanges, such as the British opium trade forming an India-China-Britain cycle from the 1810s, where opium grown in Bengal was shipped to China in exchange for tea and silver, reversing trade imbalances through addictive exports that generated £5-10 million annually by the 1830s and precipitated the Opium Wars (1839-1842 and 1856-1860).^[160] This pattern, while not directly substituting African slaves, maintained logics of unequal, forcibly imposed commodity flows post-abolition, with British East India Company monopolies enabling the triangle until legalization pressures in the 1840s.^[161] Such shifts underscored how abolition redirected but did not dismantle extractive trade architectures reliant on naval power and asymmetric dependencies.

Other Triangular Trade Patterns

Non-Atlantic Examples

In the Indian Ocean region prior to 1500, pre-European trade networks operated in patterns analogous to triangular trade, involving the exchange of spices from Southeast Asia and the Maluku Islands, enslaved individuals captured from East African interiors, and textiles manufactured in India and Arabian ports. Arab, Persian, and Swahili merchants typically shipped slaves northward from coastal entrepôts like Kilwa and Sofala to markets in the Persian Gulf, Oman, or Gujarat, where they were bartered for Indian cotton textiles and spices such as pepper and cloves; these commodities were then redistributed southward or eastward, generating profits through arbitrage in regional scarcities. Annual slave exports from East Africa during this era likely numbered in the low tens of thousands at peak, far below later Atlantic volumes, yet voyage mortality often reached 10-15% due to disease, malnutrition, and overcrowding on dhow vessels.^[96] ^[162] During the 17th century, the Dutch East India Company (VOC), established in 1602, developed intra-Asian trade circuits that mirrored triangular structures, routing ships between Coromandel Coast ports in India for textiles, the Indonesian archipelago for spices like nutmeg and cloves, and various Asian slave sources to supply labor for VOC settlements such as Batavia (modern Jakarta). Slaves, primarily from eastern Indonesia (e.g., Timor and Ambon), India, and Madagascar, were transported along these legs to Dutch factories, with total intra-Asiatic VOC slave movements estimated at 175,000 to 225,000 individuals over the company's lifespan; private traders supplemented official voyages, amplifying the scale while yielding comparable profit margins to commodity legs through low acquisition costs in source regions. Mortality rates on these shorter hauls averaged 10-20%, driven by similar factors of confinement and inadequate provisioning as in Atlantic crossings, though volumes remained dwarfed by transoceanic counterparts.^[163] ^[164]

Modern Analogues in Global Commerce

Contemporary global commerce features triangular trade patterns characterized by the extraction of raw materials from resource-rich developing regions, their transformation through manufacturing in intermediate economies, and final consumption in affluent markets, optimizing comparative advantages and logistics efficiency. For instance, minerals like cobalt from the Democratic Republic of Congo are exported to China for processing into components for electric vehicle batteries, which are then shipped as finished products to the United States and European Union.^[165] This structure mirrors historical efficiencies in minimizing return cargoes but operates within just-in-time supply chains that prioritize speed and cost reduction over fixed routes.^[166] In 2023, China's imports of critical raw materials from Africa, including 64% of its oil needs from the continent, underscored this dynamic, fueling a trade volume exceeding $280 billion annually.^[165] Foreign direct investment (FDI) flows reinforce these patterns, with developed economies investing in manufacturing hubs that source from primary producers. WTO analyses highlight triangular FDI linkages, such as investments from the US and Europe into East Asian manufacturing, which draw inputs from Africa and Latin America, enhancing regional integration but raising dependency concerns.^[167] A 2022 study on contemporary triangular trade emphasized how such cycles leverage comparative advantages, enabling developing nations to export unprocessed goods while gaining technology transfers, though often at the cost of value-added retention. Ethical sourcing debates parallel historical critiques of exploitation, focusing on labor conditions, environmental degradation, and revenue leakage in extraction zones, yet lack the coerced human element of past trades. Initiatives like the Dodd-Frank Act's conflict minerals reporting require US firms to audit supply chains from Africa to Asia, addressing armed group financing without equivalent state monopolies.^[168] Reports from the Ethical Trading Initiative note persistent issues in factory wages and safety, prompting voluntary codes, but enforcement varies, with peer-reviewed analyses attributing improvements to market pressures rather than regulatory uniformity.^[169] These concerns drive certifications and transparency demands, contrasting with unregulated historical systems.^[170]

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Cowrie Shells: Cultural and Economic Ties in the 18th-Century ...
Jul 24, 2024 · Known as cowrie shells, these artifacts have become synonymous with slavery and serve as identifiers for the presence of free and enslaved Black ...
[70]
Rum, Molasses, and Slavery in Boston - The West End Museum
In 1700, New England was importing primarily sugar and molasses from the West Indies and leaving the rum. Boston rum would now supply domestic and foreign ...
[71]
Eli Whitney's Patent for the Cotton Gin | National Archives
Dec 16, 2021 · The most significant effect of the cotton gin, however, was the growth of slavery. While it was true that the cotton gin reduced the labor of ...
[72]
11. The Cotton Revolution | THE AMERICAN YAWP
Jun 7, 2013 · Eli Whitney's mechanical cotton gin revolutionized cotton production and expanded and strengthened slavery throughout the South. Eli Whitney's ...Missing: elijah | Show results with:elijah
[73]
[PDF] Slavery & the Bank: Large print guide - Bank of England
To exclusively control the supply of, or trade in, a product or service. Triangular trade. This was the sailing route taken by slave traders. In the case of ...
[74]
Keeping “the wheel in motion”: Trans-Atlantic Credit Terms, Slave ...
Aug 27, 2015 · First introduced by Liverpool merchants in the 1750s, slave traders received bills of exchange ... British slave traders expanded the volume of ...
[75]
Profitability in the Bristol-Liverpool Slave Trade - Persée
Net profits came to £ 60,000, therefore, giving an average profit per voyage of nearly 17 %. Profits per voyage are not especially meaningful, however ; more ...
[76]
Measuring the Value of a Slave
In addition, there is considerable evidence that slaves were worked harder than free labor ... slave purchased his or a family member's freedom at a given price.
[77]
On the economic importance of the slave plantation complex to the ...
Oct 31, 2018 · In turn, this created an annual value added average equivalent to around 2.0% of British GDP during the first decade of the eighteenth century, ...
[78]
The Varieties of Slave Labor, Freedom's Story, TeacherServe ...
As plantations developed, gang labor superseded traditional laboring methods. Under this system, the processes of cultivation were divided into simple tasks ...
[79]
[PDF] NBER WORKING PAPER SERIES PRODUCTIVITY GROWTH AND ...
gang system, so plantations with more than 15 slaves account for nearly all of the productivity advantage. Large plantations were only slightly more efficient ...
[80]
Full article: Were slaves cheap laborers? A comparative study of ...
The fact that both slaves and free laborers could be hired in the South enables us to compare the direct cost of slave and free labor. This is shown in
[81]
Malaria and African Slavery in the United States
... African slave or a European mariner traveling from areas infested with the disease. ... labor: European work- ers, African slaves. and Native American ...
[82]
Alexander Hamilton's Report on Manufactures - Digital History
A member of New York's first anti-slavery society, Hamilton wanted to ... economy away from slavery and trade with the slave colonies of the Caribbean.
[83]
The Transatlantic Slave Trade Database
To date, the database includes data from 57 contributors, reflecting 34,948 voyages—an estimated 66 to 80 percent of all slaving expeditions to cross the ...<|separator|>
[84]
Middle Passage - Digital History
At least 2 million Africans--10 to 15 percent--died during the infamous "Middle Passage" across the Atlantic. Another 15 to 30 percent died during the march to ...
[85]
The Middle Passage | National Museums Liverpool
The combination of disease, inadequate food, rebellion and punishment took a heavy toll on captives and crew alike. Surviving records suggest that until the ...
[86]
SlaveVoyages
Estimates · African Names Database · Enslavers Database · Slave Ship in 3D Video
[87]
https://www.eji.org/report/transatlantic-slave-trade/
[88]
New Evidence on the Causes of Slave - and Crew Mortality in ... - jstor
Legislation, known as Dolben's Act and which was passed in 1788, limited the slave-carrying capacity of vessels, required that slave vessels carry a surgeon ...Missing: ventilation | Show results with:ventilation
[89]
Slavery before the Trans-Atlantic Trade · African Passages ...
Slavery was prevalent in many West and Central African societies before and during the trans-Atlantic slave trade. When diverse African empires, small to ...
[90]
https://oxfordre.com/anthropology/display/10.1093/acrefore/9780190854584.001.0001/acrefore-9780190854584-e-339
[91]
Estimated volume and routes of the African slave trade after 1500...
27 The direction of the trade from AD 800 to 1900 was trans-Saharan primarily (7.3 million), and across the Red Sea (2.4 million).
[92]
https://oxfordre.com/africanhistory/display/10.1093/acrefore/9780190277734.001.0001/acrefore-9780190277734-e-856
[93]
https://oxfordre.com/africanhistory/display/10.1093/acrefore/9780190277734.001.0001/acrefore-9780190277734-e-838
[94]
Ibn Battuta's Travels in Africa - Humanities LibreTexts
Apr 11, 2023 · Most of the sellers [in the market] are female slaves, who wear black garments. The inhabitants cultivate millet and irrigate it from very ...
[95]
https://medievalslavery.org/africa/source-ibn-ba%25E1%25B9%25AD%25E1%25B9%25ADu%25E1%25B9%25ADa-travels-ri%25E1%25B8%25A5lat
[96]
https://oxfordre.com/africanhistory/display/10.1093/acrefore/9780190277734.001.0001/acrefore-9780190277734-e-835
[97]
[PDF] Slavery and the Slave Trades in the Indian Ocean and Arab Worlds ...
This paper places the late- nineteenth and early-twentieth-century slave trade from east Africa to Arabia in the context of wider global economic developments.
[98]
Slave Trade and Slavery in Asia—New Perspectives
Sep 4, 2020 · Africans sold into slavery through the East African coast skyrocketed in the nineteenth century. Best estimates suggest that between 1.5 and 2.1 ...
[99]
Report The Genetic Legacy of the Indian Ocean Slave Trade
From the 8th to the 19th centuries, about four million people were captured from the shores of eastern Africa by Arab Muslim and Swahili traders.
[100]
The West and East African Slave Trades, Compared
Apr 10, 2017 · 2. Mortality Rates: In East Africa, 4 out of 5 slaves died just during the journey from the interior to the coast, not including shipping.Missing: ratio | Show results with:ratio
[101]
Slave trades, kinship structures and women's political participation ...
May 13, 2024 · The transatlantic slave trade decreased the male-to-female gender ratio as more men were exported, while the Indian Ocean slave trade increased ...
[102]
[PDF] evidence from the transatlantic slave trade - Harvard University
Male slaves vastly outnumbered female slaves in the transatlantic slave trade, as males were preferred by plantation owners in the New World for their physical ...
[103]
[PDF] The Rise and Fall of Omani Plantation Slavery in Nineteenth ...
In the early nineteenth century, a new slave system emerged which would be all but completely eliminated less than one hundred years later.
[104]
https://oxfordre.com/africanhistory/display/10.1093/acrefore/9780190277734.001.0001/acrefore-9780190277734-e-598
[105]
Liverpool's Dominance in the British Slave Trade, 1740–1807
Liverpool sent out 217 slaving ships in the period 1741–50 – 43 per cent of the vessels dispatched in the British slave trade.Missing: growth triangular facts numbers<|separator|>
[106]
Archive sheet 3 - Liverpool and the transatlantic slave trade
In the 1790s Liverpool controlled 80% of the British slave trade and over 40% of the European slave trade. The reasons for Liverpool's control of the trade are ...
[107]
Liverpool in the Atlantic World 1500-1833 - Oxford Bibliographies
Feb 21, 2023 · During the 18th century alone Liverpool's imports grew from 14,600 tons in 1709 to 450,000 tons in 1800. It population increased concomitantly ...Missing: triangular | Show results with:triangular
[108]
Empire and slavery did not make Britain rich, finds new IEA book
May 1, 2024 · Slave-based sugar plantations added just under 2.5% to the value of the British economy at its peak, less than the share of sheep farming.
[109]
[PDF] Slavery and the British Industrial Revolution∗ - Princeton University
Aug 17, 2023 · Some abolitionists hoped that slavery would be unsustainable without the slave trade, but further legislation was delayed by the Revolutionary ...
[110]
The Story of Britain's Industrial Revolution: How Slavery Wealth ...
Feb 2, 2024 · New research provides evidence on how the wealth Britons accumulated through the transatlantic slave trade and slave labour in the Americas ...<|separator|>
[111]
Prior to the US Civil War, slaves produced approximately 12.6% of ...
Oct 4, 2023 · Slavery did not accelerate US economic growth in the 19th century. The slave South discouraged immigration, underinvested in transportation ...Do you think slavery had a significant impact on American economy?Both the North and South started out as agricultural economies ...More results from www.reddit.com
[112]
Slavery and Economic Growth in the Early United States
Dec 1, 2022 · To be clear: slave labor was arduous and brutal, and slave plantations were highly successful as cotton producers. Migration into the lush soils ...
[113]
[PDF] The Long-Term Effects of Africa's Slave Trades
Together the evidence suggests that the slave trades have had an adverse effect on economic development. Nathan Nunn. Department of Economics. Harvard ...
[114]
Long-term Effects of Africa's Slave Trades - Oxford Academic
I find a robust negative relationship between the number of slaves exported from a country and current economic performance. To better understand if the ...
[115]
Understanding the long-run effects of Africa's slave trades - CEPR
Feb 27, 2017 · In the Indian Ocean slave trade, slaves were taken from Eastern Africa and shipped either to the Middle East, India, or the plantation islands ...
[116]
The Long-Term Effects of Africa's Slave Trades | NBER
Sep 6, 2007 · The evidence suggests that the slave trades have had an adverse effect on economic development.
[117]
[PDF] THE GUN-SLAVE HYPOTHESIS AND THE 18TH CENTURY ...
Running in the opposite direction is a version of the hypothesis I call slaves-for-guns-derived, which claims that it was African- induced increases in slave ...
[118]
https://www.degruyterbrill.com/document/doi/10.1515/9789048560509-003/html
[119]
How geography constrained development in Sub-Saharan Africa
Oct 11, 2024 · In this article, I will explain how geography constrained the material progress of Sub-Saharan Africa.
[120]
[PDF] RUGGEDNESS: THE BLESSING OF BAD GEOGRAPHY IN AFRICA
We do this using data from. Nunn (2008) on the number of slaves taken from each country between 1400 and 1900 during Africa's four slave trades. The figures are ...
[121]
How the International Slave Trades Underdeveloped Africa
Apr 26, 2022 · Recent econometric research has found recurring evidence that the international slave trades underdeveloped Africa over the long term.<|control11|><|separator|>
[122]
[PDF] The Transatlantic Slave Trade - Genocide Education Project
Unlike most twentieth-century cases of premeditated mass killing, the African slave trade was not undertaken by a single political force or.Missing: sea | Show results with:sea
[123]
The Human Cost | National Museum of African American History ...
The average lifespan of enslaved Africans who worked on colonial sugar and rice plantations was seven years. Extreme physical demands relied on equally ...
[124]
How Slavery Affected African American Families, Freedom's Story ...
Enslaved people lived with the perpetual possibility of separation through the sale of one or more family members. Slaveowners' wealth lay largely in the people ...
[125]
History of Family Separation - The Gathering For Justice
SLAVERY (1501-1865) · The United States often split enslaved black families and sold to other slave owners, leaving families torn apart and some never reuniting.
[126]
Maroons and Marronage - Atlantic History - Oxford Bibliographies
Aug 30, 2016 · The term “maroons” refers to people who escaped slavery to create independent groups and communities on the outskirts of slave societies.
[127]
Maroon Communities in the Americas - Slavery and Remembrance
Maroon communities were formed by escaped slaves in secluded areas, developing their own culture and resistance, and also found in Africa and North America.Missing: maroonage | Show results with:maroonage
[128]
Resistance and Rebellion
African resistance to enslavement and captives' rebellion against the conditions of slavery were natural reactions to the transatlantic slave trade.Missing: maroonage | Show results with:maroonage
[129]
(PDF) The dynamics of slavery in Brazil: resistance, the slave trade ...
Aug 5, 2025 · The article examines the relationships between the Brazil-bound transatlantic slave trade, manumission patterns and the creation of ...
[130]
https://socialsciences.scielo.org/scielo.php?script=sci_arttext&pid=S0101-33002006000200004
[131]
[PDF] The “Williams Thesis” and the Debate on Slavery's Relationship with ...
Dec 22, 2023 · Abstract: In 1944, the publication of Eric. Williams' thesis Capitalism and Slavery sparked a historiographical debate that continues to ...
[132]
Slavery, Atlantic Trade and the British Economy, 1660-1800 - EH.net
Published by EH.NET (October 2001). Kenneth Morgan, Slavery, Atlantic Trade and the British Economy,. 1660-1800. New York: Cambridge University Press, ...Missing: capitalism | Show results with:capitalism<|separator|>
[133]
Capitalism, Slavery, and the Industrial Revolution
Aug 26, 2022 · Profits from the slave trade were not demonstrably large compared with British national income. While they were pretty big compared with ...
[134]
[PDF] Commodities, Prices and Risk: the changing market for non-slave ...
This means that given the falling prices of the goods required to barter for goods on the coast17, by the time of abolition prices for commodities appeared to ...Missing: asymmetry | Show results with:asymmetry
[135]
[PDF] Atlantic slavery's impact on European and British economic ...
Nov 15, 2018 · The study found that more slaving voyages were associated with European city growth, with a 10% increase in slaving voyages linked to a 1.2% ...
[136]
[PDF] Slavery and Anglo-American Capitalism Revisited.
The article argues that slavery was not vital for US economic growth, as cotton could be cultivated without it, and that this applies to both British and ...
[137]
Slavery and the British Industrial Revolution | CEPR
Feb 11, 2023 · This column examines geographically disaggregated data on the impact that slavery wealth had on Britain's industrial development.
[138]
[PDF] The Colonial Origins of Comparative Development - MIT Economics
These re- sults suggest that Africa is poorer than the rest of the world not because of pure geographic or cultural factors, but because of worse institutions.
[139]
[PDF] Reversal of Fortune: Geography and Institutions in the Making of the ...
slave trade fundamentally altered the organization of society in Africa, leading to state centralization and warfare as African polities competed to control ...
[140]
Historical legacies: A model linking Africa's past to its current ...
Recent studies have found evidence linking Africa's current under-development to colonial rule and the slave trade. Given that these events ended long ago, ...
[141]
[PDF] Africa: slavery and the world economy, 1700–1870 - Patrick Manning
The expansion in continental slavery brought widespread disruption and militarization of the continent, yet it concentrated wealth in the hands of elites and.
[142]
Slavery did not accelerate US economic growth in the 19th century ...
May 10, 2022 · Slavery did not accelerate US economic growth in the 19th century. The slave South discouraged immigration, underinvested in transportation infrastructure, and ...
[143]
Africa: Slavery and the World Economy, 1700–1870 (Chapter 10)
For Central Africa, Atlantic slave exports grew at 1 per cent per year during the eighteenth century to 30,000 per year, remained at that level from 1800 to ...
[144]
Thomas Sowell on Slavery and This Fact — There Are More Slaves ...
There Are More Slaves Today Than Were Seized from Africa in Four Centuries. In his excellent book The ...
[145]
Sowell on Slavery - CultureWatch
Jun 5, 2024 · Sowell – who also happens to be Black – is well placed to discuss things like race, slavery, reparations and related issues.
[146]
Why Slavery is Not America's Original Sin - History Reclaimed
Jul 27, 2024 · Leaving aside Rome, Greece and Babylon as examples of the horrors of historical slavery, we find that the more familiar African slave trade also ...
[147]
The History of Slavery You Probably Weren't Taught in School
Feb 18, 2023 · Both subjects are explored in The Forgotten Slave Trade: The White European Slaves of Islam by Simon Webb and Slavery and Slaving in African ...<|control11|><|separator|>
[148]
financing the illegal transatlantic slave trade in the age of ...
Oct 11, 2016 · Slave traders forced more than 1.65 million captive Africans aboard illegal transatlantic slave ships during the nineteenth century.
[149]
[PDF] Cheaper Than a Slave: Indentured Labor, Colonialism and Capitalism
49 The triangular trade between. Europe, Africa, and the Americas was the precursor of modem global capitalism. The main successor to modem slavery was the ...
[150]
The West Africa Squadron - Historic UK
Mar 4, 2023 · Between 1807 and 1860, the Royal Navy's West Africa Squadron attacked and seized approximately 1,600 ships involved in the international ...Missing: seizures | Show results with:seizures
[151]
Nineteenth-Century Coastal Slave Trading and the British Abolition ...
The Colony of Sierra Leone was the beacon of freedom in Britain's nineteenth-century campaign to abolish the Atlantic slave trade.1 It was the foremost base ...
[152]
Voyage of the Echo: The Trials of an Illegal Trans-Atlantic Slave Ship
Almeida went ashore while the brig retreated out to sea to evade the anti-slave trade vessels patrolling the African coast.Missing: routes | Show results with:routes
[153]
https://oxfordre.com/africanhistory/display/10.1093/acrefore/9780190277734.001.0001/acrefore-9780190277734-e-938
[154]
From Slave Trade to 'Legitimate' Commerce
1 - The initial 'crisis of adaptation': the impact of British abolition on the Atlantic slave trade in West Africa, 1808–1820 · 2 - The West African palm oil ...Missing: ivory | Show results with:ivory
[155]
[PDF] The palm oil trade in the nineteenth century - Library of Congress
It was in the early nineteenth century, following the abolition of the. British slave trade, that palm oil exports from West Africa began to increase.
[156]
LEGITIMATE TRADE IN 19th CENTURY WEST AFRICA
In west Africa up to 1850, both slave trade and legitimate trade co-existed for example palm oil was continuously exported by the Calabar people while slaves ...Missing: facts | Show results with:facts
[157]
An Economic Approach to the Study of West Africa's "Legitimate Trade"
During the nineteenth century the export of bulk commodities from West Africa ex- panded at the expense of slave exports. Research has focused on the ...
[158]
[PDF] Statistics of the Slave Trade to Cuba, 1790-1867
The decade 1820-30, the first decade of the illegal slave trade to Cuba, is the one for which statistics of the number of slaves landed are hardest to find. Yet ...
[159]
The Illegal Slave Trade to Cuba after Emancipation
In 1835, eighty ships arrived for illegal trade, and 78 flew the Portuguese flag. It was estimated that there were about 300 slaves per ship, which have a high ...
[160]
[PDF] A Study of the Evolution and Impact of the British-Chinese Trade ...
British exports, that opium became a commonly used item in China. Opium entered the British-Chinese-Indian trade triangle shortly after the East India.Missing: analogy | Show results with:analogy
[161]
The dark history behind India and the UK's favourite drink - BBC News
Jul 15, 2016 · When the Chinese made the trade in opium illegal the Company sidestepped the ban by auctioning its opium off to smaller traders who smuggled it ...Missing: triangular analogy
[162]
[PDF] Slavery and the Slave Trades in the Indian Ocean and Arab Worlds ...
After tracing very briefly the history of enslaved and freed sea workers in the Indian Ocean, my paper focuses on African bondsmen and freedmen during the.
[163]
https://oxfordre.com/asianhistory/display/10.1093/acrefore/9780190277727.001.0001/acrefore-9780190277727-e-403
[164]
Full article: Private slave trade in the Dutch Indian Ocean world
Apr 13, 2016 · This article explores the local and intercontinental networks that underpinned the private trade in slaves and the transportation of the enslaved in the VOC ...
[165]
The China–US–Russia “Triangle” and Africa - PMC
Mar 29, 2023 · Oil accounts for 64% of China's total imports from Africa. Africa also provides 6% of Chinese iron-ore imports and 8.3% of copper imports.
[166]
Triangular trade business model - LinkedIn
Jun 24, 2024 · Triangular trade refers to the trade activities among three countries or regions, where each party participates in the exchange of goods, resources, or ...
[167]
How FDI influences the triangular trade pattern among China, East ...
An increase in capital stock brought about by FDI inflows in Chinese Electronics increases East Asia–China integration, but East Asia will lose other markets.
[168]
The Ethics of Global Sourcing: Balancing Cost with Human and ...
Oct 17, 2024 · This article explores the ethics of global sourcing, focusing on how businesses can ensure human rights and environmental responsibility while staying ...
[169]
Slavery: why it's on the increase | Ethical Trading Initiative
The triangular trade: goods, slaves, sugar. Sugar was one of the most significant products and most people can remember from school the triangular trade ...
[170]
Globalization and Ethical Trade: Assessing the Implications for ...
Aug 9, 2025 · Ethical trade is a paradox of globalization, involving the introduction of company codes of conduct covering employ standards through private sector ...