The Crusades significantly impacted European society by fostering cultural interactions between the East and West. They spurred renewed interest in trade, leading to the expansion of commerce and economic growth in Western Europe. The influx of Eastern knowledge and goods, especially in areas like science, medicine, and philosophy, contributed to the Renaissance. Moreover, the Crusades helped to establish a sense of identity and unity within Europe, as they were often framed as a collective Christian effort. Additionally, the religious fervor and militarization during this period influenced societal values and attitudes towards religion and warfare in the medieval world.