Why did the crusades bring an end to feudalism?

The Crusades contributed to the decline of feudalism by weakening the power of local lords as many nobles sold their lands to finance their participation, leading to a centralization of authority. Additionally, the return of crusaders brought new wealth and ideas, fostering trade and the growth of towns, which diminished the reliance on the feudal system. As a result, peasants gained more freedom and opportunities, further eroding the manorial system that characterized feudalism.