Why Is Monophysitism A Heresy?

Why Is Monophysitism A Heresy? Monophysitism mənŏf ́ĭsĭt ̋ĭzəm [key] [Gr.,=belief in a single nature], a heresy of the 5th and 6th cent., which grew out of a reaction against Nestorianism. … Monophysitism challenged the orthodox definition of faith of Chalcedon and taught that in Jesus there were not two natures (divine and human) but