The condition of mankind, during the last quarter of the fifteenth century, bore some curious analogies to its state at present. A certain stage or epoch of human life seemed to have run its course and come to a stop. The impulses which had started it were exhausted. In the political field, feudalism, originally beneficent, had become tyrannous and stifling; and monarchy, at first an austere necessity, had grown to be, beyond measure, arrogant, selfish, and luxurious. In science, the old methods had proved themselves puerile and inefficient, and the leading scientists were magicians and witches; in literature, no poet had arisen worthy to strike the lyre that Chaucer tuned to music. As for religion, the corruptions of the papacy, and the corresponding degradation of the monasteries and of the priesthood generally, had brought it down from a region of sublime and self-abnegating faith, to a commodity for raising money, and a cloak to hide profligacy. Martin Luther was still in the womb of the future; and so were Shakespeare, Bacon, Galileo, Descartes, and Oliver Cromwell. Pessimists were declaring, according to their invariable custom, that what was bad would get worse, and that what was good would disappear. But there were, scattered here and there throughout Christendom, a number of men of the profounder, optimistic tendency, who saw in existing abuses but the misuse or misapprehension of elements intrinsically good; who knew that evils bear in themselves the seeds of their own extirpation; and who believed that Providence, far from having failed in its design to secure the ultimate happiness of the human race, was bringing the old order of things to a close in order to provide place for something new and higher. But that obstacle in the way of improvement which was apparently the most immovable, was the geographical one. The habitable earth was used up. Outside of Europe there was nothing, save inaccessible wilderness, and barren, boundless seas. There was nothing for the mass of men to do, and yet their energy and desire were as great as ever; there was nowhere for them to go, and yet they were steadily increasing in numbers. The Crusades had amused them for a while, but they were done with; the plague had thinned them out, and war had helped the plague; but the birth-rate was more than a match for both. A new planet, with all the fresh interests and possibilities which that would involve, seemed absolutely necessary. But who should erect a ladder to the stars, or draw them down from the sky within man's reach? The one indispensable thing was also the one thing impossible.