Q. 1. What is the heresy of "Monophysitism?"

A. 1. The heresy of "Monophysitism," can be defined as "Jesus Christ, who is identical with the Son, is one person and one hypostasis in one nature: divine." "Hypostasis" is the idea that there is a shared existence of spiritual and corporal entities.

Wikipedia defines "Monophysitism" as the "belief that Christ's divinity dominates and overwhelms his humanity, as opposed to the Chalcedonian position which holds that Christ has two natures, one divine and one human or the Miaphysite position which holds that the human nature and pre-incarnate divine nature of Christ were united as one divine human nature from the point of the Incarnation onwards."

When "Monophysitism" was condemned, Eutyches emerged with complete opposite views. He was excommunicated in 448. Both, "Monophysitism" and "Eutyches" were rejected at the Council of Chalcedon in 451 AD.