From Erasmus and his compeers he undoubtedly borrowed, in addition to a spirit of justifiable criticism, an exaggerated sentiment of independence towards ecclesiastical antiquity. The contact with their humanistic views assuredly strengthened in him the modern tendency to individualism. Not long after a change in the nature of his friendship necessarily took place. His antagonism to Erasmus in the matter of his doctrine of Grace led to a bitter dispute between the two, to which Luther’s contribution was his work on “The Servitude of the Will” (_De servo arbitrio_); at the same time his alliance with the Humanists remained of value to him in the subversive movement which he had inaugurated. Mighty indeed were the forces, heralds of a spiritual upheaval, which, since the fifteenth century, had streamed through the Western world in closer or more distant connection with the great revival of the study of classical antiquity. They proclaimed the advent of a new cycle in the history of mankind. This excited world could not fail to impart its impulse to the youthful Luther. The recently discovered art of printing had, as it were at one blow, created a world-wide community of intellectual productions and literary ideas such as the Middle Ages had never dreamed of. The nations were drawn closer together at that period by the interchange of the most varied and far-reaching discoveries. The spirit of worldly enterprise awoke as from a long slumber as a result of the astonishing discovery of great and wealthy countries overseas. With the greater facilities for intellectual intercourse and the increase of means of study, criticism set to work on all branches of learning with greater results than ever before. The greater States now did what they had been willing but unable to do before; they freed themselves more and more from the former tutelage of the Church; they aimed at securing freedom and shaking off that priestly influence to which, in part at least, they owed their stability and their growth; nor was this movement confined to the greater States, for, in Germany, at any rate, the wealthy cities, the great landed proprietors and princes were all alike intent on ridding themselves of the oppression under which they had hitherto laboured and on securing for themselves an increase of power. In brief, everywhere the old restraints were breaking down, everywhere a forward movement of individualism was in progress at the expense of the commonweal and the traditional order of the Middle Ages; but, above all, at the expense of the Church’s religious authority, which, alone till then, had kept individualism in check to the profit of humanity.