The factor that most contributed to the development of the manor system in Western Europe after the fall of the Roman Empire was the need for security and protection. The collapse of the Roman Empire led to a period of instability and insecurity, with invasions from various groups such as Vikings, barbarians, and other warlords. In response, people sought protection and safety, leading to the development of the manor system. Under this system, local lords provided protection to the peasants or serfs in exchange for their labor and loyalty. The manor system thus emerged as a way to maintain order and security in the face of external threats.
