The traditional history of the Christian Church has generally maintained that the Crusades were due solely to religious influence and sprang from ideal and moral motives: those hundreds of thousands of warriors who went out to the East were religious enthusiasts, prompted by the pious longings of their hearts, and Peter the Hermit, it was claimed, had received a divine message to call Christendom to arms, to preach a Crusade against the unbelievers and take possession of the Holy Sepulchre. That such ideal reasons should be attributed to a war like the Crusades, of a wide and far-reaching influence on the political and intellectual development of mediaeval Europe, is not at all surprising. In the history of humanity there have been few wars in which the combatants on both sides were not convinced that they had drawn their swords for some noble purpose, for the cause of right and justice. That the motives prompting the vast display of arms witnessed during the Crusades, that the wanderings of those crowds to the East during two centuries, and the cruelties committed by the saintly warriors on their way to the Holy Sepulchre, should be attributed exclusively to ideal and religious sources is therefore quite natural. It is not to be denied that there was a religious factor in the Crusades; but that the religious motive was not the sole incentive has now been agreed upon by impartial historians; and in so far as the motives animating the Crusaders were religious motives, we are to look to powerful influences which gradually made themselves felt from without the ecclesiastical organisations. It was by no means a movement which the Church alone had called into being. On the contrary, only when the movement had grown ripe did Gregory VII. hasten to take steps to enable the Church to control it. The idea of a Crusade for the glory of religion had not sprung from the tenets of Christianity; it was given to mediaeval Europe by the Muhammedans.