The First Crusade set out in 1096. A second went in 1144, and a third in 1187. These were the great Crusades, though five others were undertaken during the thirteenth century. Jerusalem was taken and lost. The Christians quarreled with one another and with the Greeks, though with the Saracens they established somewhat friendly relations, and a mutual respect arose. The armies which went were composed of all kinds of people --lords, knights, merchants, adventurers, peasants, outlaws--and a spirit of adventure and a desire for personal gain, as well as a spirit of religious devotion, actuated many who went. In 1204 the Venetians diverted the fourth crusade to the capture of Constantinople, and established there an outpost of their great commercial empire. The history of the crusades we do not need to trace. The important matter for our purpose was the results of the movement on the intellectual development of western Europe. RESULTS OF THE CRUSADES ON WESTERN EUROPE. In a sense the Crusades were an outward manifestation of the great change in thinking and ideals which had begun sometime before in western Europe. They were at once both a sign and a cause of further change. The old isolation was at last about to end, and intercommunication and some common ideas and common feelings were being brought about. Both those who went and those who remained at home were deeply stirred by the movement. Christendom as a great international community, in which all alike were interested in a common ideal and in a common fight against the infidel, was a new idea now dawning upon the mass of the people, whereas before it had been but little understood.