Latin Syria and the West, 1149–1187
Historians of the crusades have given most of their attention to the major crusading expeditions, especially to the first, and to the surface history of the Latin states in Syria, especially to that of the kingdom of Jerusalem. They have shown less interest in those conditions in western Europe from which all crusading activity grew. It is true that the roots of the movement prior to the First Crusade were traced by Erdmann in a magisterial study which remains the most important contribution made to the subject during the present century. But the First Crusade was not the end of the matter. European sentiment about the crusades and the Latin states continued to develop during the twelfth and thirteenth centuries and beyond. Even in the twelfth century there was a body of opinion which was highly critical of crusading activity and this grew in the course of time; but the main weight of conventional opinion in the later twelfth and earlier thirteenth century came to accept the crusade, and the maintenance or recovery of Latin possession of the Holy Places, as a Christian responsibility.