Page:Revolution and Other Essays.djvu/159

 greater, portion may be ascribed to the perfection of the means of locomotion and communication. The enlargement of stellar space, demonstrating with stunning force the insignificance of the earth, has been negative in its effect; but the quickening of travel and intercourse, by making the earth's parts accessible and knitting them together, has been positive.

The advantage of the animal over the vegetable kingdom is obvious. The cabbage, should its environment tend to become worse, must live it out, or die; the rabbit may move on in quest of a better. But, after all, the swift-footed creatures are circumscribed in their wanderings. The first large river almost inevitably bars their way, and certainly the first salt sea becomes an impassable obstacle. Better locomotion may be classed as one of the prime aims of the old natural selection; for in that primordial day the race was to the swift as surely as the battle to the strong. But man, already preeminent in the common domain because of other faculties, was not content with the one form of locomotion afforded by his lower limbs. He swam in the sea, and, still better, becoming aware of the buoyant virtues of