Feudalism developed following the frequent invasions of the Vikings in the Middle Ages, between the 900s and the early 1500s. Feudalism achieved its goal creating a system in which the king would appoint lords who would appoint knights to appoint serfs who were expected to work the land and fields in exchange for food, protection and shelter. This provided stability as lords were able to rule smaller groups of people through a system called manorialism. Feudalism allowed people to live in self-sufficient areas where there was no need to rely on trade or contact with other areas since people were interdependent. During the era of feudalism, there was no separation between Church and State, which left the Church (religion) very powerful. Although feudalism provided a durable and strong system, feudalism ended. The reasons for the collapse of feudalism included the agricultural revolution, the rise of the bourgeoisie, the commercial revolution, the impact of the Crusades and the result of the bubonic plague. Although some believe that the fall of feudalism was a direct consequence of the bubonic plague, the main reasons for the collapse of feudalism were the agricultural revolution due to the production of new technologies, the rise of the bourgeoisie due from increased jobs, commerce, revolution because people did not want to be limited to what they had, and the crusades because of the power of the Church and cultural diffusion. The agricultural revolution was one of the main reasons for the collapse of feudalism because technological advances allowed for surplus food and population. The agricultural revolution was a time when there was increase and progress...... middle of paper ... and Europe's entry into a new era?" WikiAnswers. Answers Corporation, nd Web. April 29, 2014. .Regents Prep., nd Web. April 8, 2014. .Schubert, Sarah. “The Collapse of the New Hyde Park School”. : Christians at War New York: Franklin Watts, 2001. Print. “Feudalism and Religion in the Middle Ages.” Twain, Mark and Pope Urban “Confrontation at Canossa.”.