Every 500 years or so in the history of the Christian church, a significant restructuring seems to take place. Around the year 500, a church council at Chalcedon published what most of Christendom calls the clearest explanation of orthodox Christology: Christ is one person with two natures. However, large swaths of Christians—the Oriental Orthodox (such as the Coptic, Syrian, and Ethiopian churches) and the Church of the East—found the Chalcedon Definition lacking. And so the