In 1095 Pope Urban II called all Christians to take part in what would become the greatest Holy War in all of history. Urban called on Christians to take up arms and help fight to take back the Holy Land of Jerusalem from the cursed Muslims. During this period of war the whole world changed. The boundaries of the earth shifted, men gained, lost, and regained power, and bonds were forged and broken. The Crusades had a great impact on the world that will last forever. Many important social, political, religious, and economic changes occurred during the Crusades. But first, a brief history to ground these reasons. In the year 1095 the First Crusade had just begun. Pope Urban II called on Christians to liberate the Holy Land from Muslim oppressors. He promised indulgences and the gift of eternal life in the Kingdom of Heaven for fighting in the holy war. Those who answered the call were the farmers, the beggars, the poor seeking wealth and the unknown seeking glory. What began as a pilgrimage to help Christians protect their borders and repel foreign invaders soon became the first of many holy wars for the Kingdom of God. During the First Crusade, peasants and knights alike fought for God and glory traveling east to Jerusalem. In 1099 Christian forces reached Jerusalem and prepared to reconquer it. The Western Crusaders attacked the city and took control of it. During the capture of Jerusalem, the Crusader forces massacred not only Muslims, but also Jews and even other Christians. Men, women and children, no one was safe from these crusaders who did as they pleased. They massacred the inhabitants of Jerusalem in the streets, without caring what God might think (which is ironic considering this... middle of paper... in the Kingdom of Heaven, Balian teaches the people how to get water from the earth by digging a hole in the ground. Traders teach each other techniques to improve and become more profitable. Although the crusades had many positive results, some were not so great. During the crusades hatred was formed between Christians and Muslims. This hatred will last many years and in some respects continues today. The continuous fighting between the Christian crusaders and the Muslim people transformed religion into a license to kill, which justified the massacre of men, women and children were seen as a failure during their time, the Crusades had a tremendous impact on the world. This impact can be seen through the numerous social, political, economic, and religious changes that developed during the Crusades. Some of these changes still last today.