Monophysitism is a 5th century Christological heresy that believed Jesus had only a divine nature and his human nature was absorbed by the divine. It emerged in response to Nestorianism which emphasized the distinction between Christ's natures. The Catholic Church condemned Monophysitism at the Council of Chalcedon in 451, affirming Christ has two complete natures, divine and human, united in one person. Monophysitism serves as an important reminder of upholding the full humanity and divinity of Christ.