This essay provides a comparative analysis of the three major civilizations that emerged as heirs to the Roman Empire: Islam, Byzantium, and the West. It discusses their similarities, differences, strengths, and weaknesses, highlighting the unique characteristics of each. The essay also delves into the causes, characteristics, and effects of the medieval crusades, examining the roles played by each civilization. Furthermore, it includes an identification of St. Benedict and an analysis of the factors contributing to the Spanish success at Cajamarca, offering a comprehensive overview of key historical events and figures during this transformative period. This assignment solution is available on Desklib, a platform providing study tools and resources for students.