ranean waters. In 1529 the Turks besieged Vienna, and were defeated rather by the weather than by the defenders. The Habsburg empire of Charles V paid the Sultan tribute. It was not until the battle of Lepanto in 1571, the battle in which Cervantes, the author of Don Quixote, lost his left arm, that Christendom, to use his words, "broke the pride of the Osmans and undeceived the world which had regarded the Turkish fleet as invincible." The sole region of Christian advance was Spain. A man of foresight surveying the world in the early sixteenth century might well have concluded that it was only a matter of a few generations before the whole world became Mongolian—and probably Moslem. Just as to-day most people seem to take it for granted that European rule and a sort of liberal Christianity are destined to spread over the whole world. Few people seem to realize how recent a thing is this European ascendancy. It was only as the fifteenth century drew to its close that any indications of the real vitality of Western Europe became clearly apparent.
Our history is now approaching our own times, and our study becomes more and more a study of the existing state of affairs. The European or Europeanized system in which the reader is living is the same system that we see developing in the crumpled-up, Mongol-threatened Europe of the early fifteenth century. Its problems then were the embryonic form of the problems of to-day. It is impossible to discuss that time without discussing our own time. We become political in spite of ourselves. "Politics without history has no root," said Sir J. R. Seeley; "history without politics has no fruit."
Let us try, with as much detachment as we can achieve, to discover what the forces were that were dividing and holding back the energies of Europe during this tremendous outbreak of the Mongol peoples, and how we are to explain the accumulation of mental and physical energy that undoubtedly went on during this phase of apparent retrocession, and which broke out so impressively at its close.
Now, just as in the Mesozoic Age, while the great reptiles lorded it over the earth, there were developing in odd out-of-the-way corners those hairy mammals and feathered birds who were finally to supersede that tremendous fauna altogether by another far
