The seeming contradiction between the simplicity everywhere aimed at by the men of the twelfth century and the confusion of their society was the natural and inevitable result of the conditions which limited their action. They, with their keenness of mind, could almost remember ancestors who had been half barbarians. The material with which they had to work was painfully scanty. It was not only that the time, with its fluidity and the swiftness and extent of its social changes, had as yet found no formula that might approach a definition of its inmost spirit. That difficulty was met a generation later in the mid-thirteenth century, with Aquinas, St. Louis, and the culmination of the Gothic. The underlying trouble was that, even at their best, the Middle Ages had no sufficient accumulation either of knowledge or of material resources. For want of ordered and detailed knowledge, the complexity of problems could not be grasped, and for want of resources the material disasters of the fourteenth century were to be fatal to the mediæval experiment. As yet, about the year 1200, synthesis and such near approach to perfection as is permitted to man were in process of attainment. There was no muddle-headed modern illusion of the necessary goodness of change under the name of “progress.” It was because the new things that they had made were certainly good that men felt that they had reason to hope. Our books over-emphasize the deficiencies of the Middle Ages as compared with ourselves. But it is true that they were unable to transform completely the unpromising material they had at hand.