Another example of man’s subjugation of nature is found in great mountain chains. During the first centuries after Christ, the cultivated south of Europe was separated from the uncultivated Celtic and Teutonic north by a great natural barrier, the unbroken, untraversed Alpine chain, which passed through all central Europe from west to east. At the south lay the rich states of the old world, beyond the Alps was the cold and barren north. But this old formidable barrier has vanished, as the thronged cantons of Switzerland and the crowded villages of the Tyrol yearly bear witness; and they draw thousands of tourists instead of repelling them. What a mighty change! From Provence to Styria run the stately forms of the Alpine chain; but the deep recesses and the lofty highlands are thickly peopled, the forests are thinned, the obstructing rocks removed. No longer a barrier between the north and the south, as it was in the time of Julius and Augustus Cæsar, Switzerland has become a country of stupendous highways. The peaks which were once unapproachable, and around which merely eagles idly flew, are now the passes of Mount Cenis, the Simplon, Saint Gothard, the Splügen, and Saint Bernard; while the snowy heights of Ortler, in eastern Alps, now give place to a public road. Over the Semmering Alp a railway even passes. Just as the wild horse of Toorkistan has given up his freedom and has become the tame and useful servant of civilization, so this Alpine segment of the globe has changed all its relations to the adjacent countries. The influence of the most stupendous natural objects is weakened every year. The physical dimensions may and do remain unchanged, but their influence on life and on history is undermined by those new conditions which operate so powerfully in freeing man from the dominion of nature. The power of man makes him master of the earth, and gives even the key to the subjection of the grandest mountain chains into his hands.