Where Apollinarianism imagines a less-than-human Jesus, Eutychianism presents a Jesus whose humanity has been undone by God. It is named for Eutyches (c. 380–c. 456), who taught that “Christ is of two natures before the Incarnation, of only one afterwards.”15 This heresy is also sometimes called monophysitism,16 because it sees the incarnate Jesus as having only one nature (physis). The error here is in assuming that when divinity and humanity meet, divinity must trump humanity.
