Why was Western Europe weak during the Middle Ages?

Western Europe was weak during the Middle Ages due to a combination of factors, including the collapse of the Roman Empire, which led to political fragmentation and the rise of localized feudal systems. The constant threat of invasions from Vikings, Magyars, and Saracens further destabilized the region, hindering trade and economic development. Additionally, the lack of centralized authority and the prevalence of warfare among competing kingdoms weakened societal cohesion and infrastructure. This period also saw limited technological innovation and educational advancement, contributing to an overall stagnation in progress.