Why did the manors and nobles become less important as a result of the crusades?

The Crusades diminished the importance of manors and nobles by shifting power dynamics in medieval Europe. As nobles financed their participation in the wars, many sold or mortgaged their lands, leading to a decline in their local authority. The return of soldiers with wealth and new ideas, alongside the growth of trade and urban centers, fostered a rising middle class that increasingly challenged feudal structures. Ultimately, this contributed to the gradual decline of feudalism and the rise of centralized monarchies.