5th century

Eutychianism / Monophysitism

Christ has only one nature after the incarnation, often described as His humanity being absorbed into His divinity.

The Central Error

Rather than separating Christ’s natures too sharply, it blends or collapses them.

Council of Chalcedon, A.D. 451.

Teaching in which Jesus’ humanity is swallowed by His deity, leaving Him not truly human like us, apart from sin.