The Crusades - from chaos to shared ideal in Christian Europe

"Following the collapse of the Carolingian Empire in the 9th century, Christian Europe had wrestled with increasingly senseless and uncontrollable violence. Muslim and Viking invasions during that time caused internal disintegration that eliminated all centralized power. By the 11th century, knights--even kings--had become indistinguishable from brigands." How did the Crusades change this?

Crusader-Muslim relationships during the Crusades

ln the late eleventh century, when the first crusade arrived in the Middle East, the region was not predominantly Muslim. The population was divided between Greek and other eastern Christians, Jews, Muslims, and minority religious groups which did not fit precisely into any of the three great religions.