The story of the Crusades is that of a consummate political tragedy - in which the Levant was made less safe for every party involved. What caused this clash between the Islamic powers of the region and the European powers led by the Pope? Once the Outremer was established after the First Crusade, what caused these kingdoms to collapse and what lessons can we draw from their collapse?

The story of the Crusades is that of a consummate political tragedy - in which the Levant was made less safe for every party involved. What caused this clash between the Islamic powers of the region and the European powers led by the Pope? Once the Outremer was established after the First Crusade, what caused these kingdoms to collapse and what lessons can we draw from their collapse?