How does competition create conflict

It amplifies the need to be better than someone at that moment, and if you don't win said competition then you're not as good as the person who did win. It can make you feel inferior and upset at little things the winner does.

Explanation:

Two of the most major outcomes resulting from the Crusades were that the King's authority increased vastly and the Europeans learned new and more things from the Muslims that they had encountered and come across. Many of the peasants and farmers left their land to go fight in the wars, and wen they died, their land was handed over to the king.