A series of agricultural disasters and the movement of the black death through Europe brought an end to feudalism. As there were few people left to uphold it, feudalism gradually gave way to better economic circumstances that empowered citizens to gain more rights.
While living under feudalism, many people in Europe worked the land for lords, who they were tied to. Europe relied on agriculture for income, so when there were periods of poor crops followed by the black death wiping out much of its population, there were not enough serfs remaining to support feudalism. Eventually economic conditions changed so that people were able to establish themselves as merchants. Thanks to prosperity among non-noble classes it was possible for citizens to gain more rights.