Monophysitism
Monophysitism is a fifth-century Christological doctrine asserting that Jesus Christ has only one nature, divine in essence, in which the human nature is wholly absorbed or subsumed without independent subsistence.[1][2] Promoted primarily by the monk Eutyches of Constantinople, it rejected the distinction between divine and human natures upheld by earlier church fathers and councils, emphasizing instead the unity of Christ's person to counter perceived Nestorian separation of natures.[3][2] The doctrine was formally condemned as heretical at the Council of Chalcedon in 451 AD, which defined the orthodox position of two natures—fully divine and fully human—united in one hypostasis or person without confusion, change, division, or separation.[2][4] This rejection precipitated enduring schisms, notably with non-Chalcedonian communities in Egypt, Syria, Armenia, and Ethiopia, whose adherents—often labeled monophysites by opponents—self-identify as miaphysites, maintaining a single composite nature that preserves the full integrity of both divinity and humanity in union, distinct from strict monophysitism's absorption of the human element.[5][6] Despite ecclesiastical anathemas and marginalization, monophysitism's emphasis on divine unity influenced theological discourse and persisted in isolated sects, underscoring deep divisions over the mechanics of the Incarnation that shaped Eastern Christian identities.[7]