Charles C. Yost is associate professor of medieval history at Hillsdale College. He earned his PhD in medieval studies at the University of Notre Dame in 2019 and his MA in medieval studies at Columbia University in 2012. At Hillsdale College, he was named "Professor of the Year" in 2024. Although his specific areas of research are the historic relations between the Byzantine Empire and the Latin West, the problem of the schism, and Byzantine intellectuals who supported communion with Rome, he has taught and written broadly on medieval and Byzantine civilization in both popular and academic venues. His study on Rome and Constantinople in the minds of Byzantine unionists appeared in the journal Pietas in 2025. His major study on the thought of the last great unionist, John Plousiadenos (✝1500), appeared in Speculum, the premier anglophone journal of medieval studies, in April 2026.