Europe and the Security Schism
After several centuries of slowly drifting apart, the Eastern Roman Empire’s Orthodox Church and what became known as the Roman Catholic Church of Rome split. This difference, due to arguments about doctrine and pre-eminence of Pope and Patriarch, ended up having continental consequences. The gulf widened over time, until the Fourth Crusade in the 13th century. Due to the persuasive brilliance (if strategic foolishness) of Venice’s doge, Enrico Dandolo, this holy war was diverted from Jerusalem to target Constantinople. A…