4. In this system, one main principle is the balance of power. This means that any one state may be prevented from enlarging its bounds to such an extent as to endanger its neighbors. We have seen the action of such a principle among the ancient states of Greece. Even in the Middle Ages, as regards Italy, the popes endeavored to keep up an equilibrium. They supported the Norman kingdom in Southern Italy, or the Lombard leagues in the North, as a counterpoise to the German emperors. In the sixteenth century, there were formed combinations to check the power of Charles V., king of Spain and emperor of Germany, and afterwards to restrain his successor on the Spanish throne, Philip II. In the seventeenth century, there were like combinations against Louis XIV. of France, and, over a century later, against the first Napoleon.
5. The vast influence and control of Europe, by discovery, colonization, and commerce, in other quarters of the globe, is a striking feature of modern times.
6. With the increase of commerce and the growing power of the middle classes, there has arisen the "industrial age." Interests connected with production and trade, and with the material side of civilization, have come into great prominence.
7. Both the pursuits of men, and culture, have become far more diversified than was the case in the Middle Ages.
8. The influence of Christianity in its ethical relations—as an instrument of political and social reform, and a motive to philanthropy—has become more active and conspicuous.
PERIOD I. FROM THE FALL OF CONSTANTINOPLE TO THE REFORMATION (1453-1517):
THE CONSOLIDATION OF MONARCHY: INVENTION AND DISCOVERY: THE RENAISSANCE.
CHARACTER OF THIS PERIOD.—In this period monarchy, especially in France, England, and Spain, acquires new strength and extension. The period includes the reigns of three kings who did much to help forward this change: Louis XI. of France, Henry VII. of England, and Ferdinand the Catholic of Spain. The Italian wars begin with the French invasion of Italy: the rivalship of the kingdoms, and the struggles pertaining to the balance of power, are thus initiated. In this period fall new inventions which have altered the character of civilization, and great geographical discoveries, of which the discovery of the New World is the chief. It is the epoch, moreover, of the Renaissance, or the re-awakening of learning and art. There is a new era in culture. All these movements and changes foretoken greater revolutions in the age that was to follow.