Now, what led to this sudden awakening? Was it chance, or the effect of certain causes which had long been operating'? It has been seen that hospitals and various institutions, whose foundations were dedicated to humanity, were erected in all parts of Europe; that gradually there had come about a better social organization; that there had been a diminution of conflicts between princes and their vassals, and the relations between the two were more nearly at an equilibrium. Moreover, the invention of the compass, which rendered long voyages less dangerous and more frequent, opened up to trade regions hitherto inaccessible or unknown, and attracted interest toward commerce as a means of pecuniary gain. The telescope had been invented, and{100} astronomy was able to seize upon some of the facts by it revealed, and thereby to make more interesting calculations concerning the motions of celestial bodies, and attain a knowledge of our solar system and its laws. Gradually the microscope shed light upon the hitherto unseen; engraving on copper had added its power of illustration to the works of the great writers as they appeared; but above all, that which brought about this condition of affairs was the discovery of the art of printing. The first attempts in this direction were made between the years 1435 and 1440, and by the united efforts of three men, whose names deserve mention so long as their art persists,--namely, Guttenberg, Faust, and Shoeffer. Thanks to them, the same information could be multiplied in manifold form and transmitted to all parts of the civilized globe. In this way intelligence and reason become triumphant; thenceforward the dominion of brute force was broken, and knowledge, because capable of dissemination, became imperishable.