Hitherto every civilization that has arisen has been able to develop only a comparatively few activities; that is, its field of endeavor has been lim… - Theodore Roosevelt

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Hitherto every civilization that has arisen has been able to develop only a comparatively few activities; that is, its field of endeavor has been limited in kind as well as in locality. There have, of course, been great movements, but they were of practically only one form of activity; and, although usually this set in motion other kinds of activities, such was not always the case. The great religious movements have been the pre-eminent examples of this type. But they are not the only ones. Such peoples as the Mongols and the Phoenicians, at almost opposite poles of cultivation, have represented movements in which one element, military or commercial, so overshadowed all other elements that the movement died out chiefly because it was one-sided. The extraordinary outburst of activity among the Mongols of the thirteenth century was almost purely a military movement, without even any great administrative side; and it was therefore well-nigh purely a movement of destruction. The individual prowess and hardihood of the Mongols, and the perfection of their military organization rendered their armies incomparably superior to those of any European, or any other Asiatic, power of that day. They conquered from the Yellow Sea to the Persian Gulf and the Adriatic; they seized the imperial throne of China; they slew the Caliph in Bagdad; they founded dynasties in India. The fanaticism of Christianity and the fanaticism of Mohammedanism were alike powerless against them. The valor of the bravest fighting men in Europe was impotent to check them. They trampled Russia into bloody mire beneath the hoofs of their horses; they drew red furrows of destruction across Poland and Hungary; they overthrew with ease any force from western Europe that dared encounter them. Yet they had no root of permanence; their work was mere evil while it lasted, and it did not last long; and when they vanished they left hardly a trace behind them. So the extraordinary Phoenician civilization was almost purely a mercantile, a business civilization, and though it left an impress on the life that came after, this impress was faint indeed compared to that left, for instance, by the Greeks with their many-sided development. Yet the Greek civilization itself fell because this many-sided development became too exclusively one of intellect, at the expense of character, at the expense of the fundamental qualities which fit men to govern both themselves and others. When the Greek lost the sterner virtues, when his soldiers lost the fighting edge, and his statesmen grew corrupt, while the people became a faction-torn and pleasure-loving rabble, then the doom of Greece was at hand, and not all their cultivation, their intellectual brilliancy, their artistic development, their adroitness in speculative science, could save the Hellenic peoples as they bowed before the sword of the iron Roman.