The Downfall of the Middle Ages There were many reasons for the downfall for the Middle Ages, but the most crucial ones were the decline of the feudal system, and the declination of the Church's power over the nation-states. In feudal society, everyone had a definite place and a definite role, with the power resting in the hands of the local lords (instead of a central government). The lords, or nobles, lost power after the Crusades, when the Europeans came into contact with the more advanced civilizations of the Byzantine Empire and the Muslims. That spurred the growth of trade, which in turn gave rise to a money system. The money system in turn caused th