What major event effect of the crusades on europe

There was many cultural diffusion with spices and other items. 

He Crusades tended to have two major consequences effecting the social, political and economic life of Europe. The Crusades helped end feudalism in Western Europe and brought about the conditions that helped create the Renaissance.  The Crusades began the breakdown of feudal society in Western Europe.  Many feudal lords went off to fight and die in the crusades, leaving their serfs free to go to towns and start new lives.  Monarchs gained new strength when knights left to fight in the crusades in the Middle East.  This increase in the power of the monarch also helped to end feudalism.  Crusaders brought back goods such as spices and cloths, which increased demand for these goods.  Merchants, particularly in Italy, grew rich from this new trade with the East.  Crusaders also brought back Greek and Roman classical works.  The wealth from trade and new knowledge of from classical Greek and Roman works sparked the Renaissance in Europe.