One such process has already been adverted to and illustrated. It is the gradual and constant increase in man’s power over Nature, whereby he is emancipated more and more from the conditions she imposes on his life, yet is brought into an always closer touch with her by the discovery of new methods of using her gifts. Two other such processes may be briefly examined. One goes on in the sphere of time, and consists in the accumulation from age to age of the strength, the knowledge, and the culture of mankind as a whole. The other goes on in space as well as in time, and may be described as the contraction of the world, relatively to man.
The Great Increase of Population
The accumulation of physical strength is most apparent in the increase of the human race. We have no trustworthy data for determining the population, even of any one civilised country, more than a century and a half ago; much less can we conjecture that of any country in primitive or prehistoric times. It is clear, however, that in prehistoric times—say, six or seven thousand years ago, there were very few men on the earth’s surface. The scarcity of food alone would be sufficient to prove that; and, indeed, all our data go to show it. Fifty years ago the world’s population used to be roughly conjectured at from seven to nine hundred millions, two-thirds of them in China and India. It is now estimated at over fifteen hundred millions. That of Europe alone must have tripled within a century, and can hardly be less than four hundred millions. That of North America may have scarcely exceeded four or five millions in the time of Christopher Columbus, or at the date of the first English settlements, though we have only the scantiest data for a guess. It may now be 130,000,000, for there are over a hundred millions in the United States alone, about fifteen in Mexico, and eight in Canada, besides the inhabitants of Central America.
The Prolific Power of White People
The increase has been most swift in the civilised countries, such as Britain, Germany, Russia, and the United States; but it has gone on in India also since India came under British rule (famines notwithstanding), and in the regions recently colonised by Europeans, such as Australia, Siberia, and Argentina, the disappearance of aborigines being far more than compensated for by the prolific power of the white immigrants. Some regions, such as Asia Minor and parts of North Africa, are more thinly peopled now than they were under the Roman Empire, and both China and Peru may have no larger population than they had five, or ten, or fifteen centuries ago. But taking the world at large, the increase is enormous, and will apparently continue. Even after the vacant cultivable spaces which remain in the two Americas, Northern Asia, and Australasia have been filled, the discovery of new modes of enlarging the annually available stock of food may maintain the increase. It is most conspicuous among the European races, and is, of course, due to the greater production in some regions of food, and in others of commodities wherewith food can be purchased. It means an immense addition to the physical force of mankind in the aggregate, and to the possibilities of intellectual force also—a point to be considered later. And, of course, it also means an immense and growing preponderance of the civilised white nations, which are now probably one half of mankind, and may, in another century, when they have risen from about five hundred to, possibly, one thousand or fifteen hundred millions, be nearly two-thirds.
Modern Man Stronger than his Ancestors
As respects the strength of the average individual man, the inquiry is less simple. Palæolithic man and neolithic man were apparently (though here and there may have been exceptions) comparatively feeble creatures, as are the relics of the most backward tribes known to us, such as the Veddas of Ceylon, the Bushmen, the Fuegians. Some savages, as, for instance, the Patagonians, are men of great stature, and some of the North American Indians possess amazing powers of endurance. The Greeks of the fifth century B.C., and the Teutons of the time of Julius Cæsar, had reached a high physical development. Pheidippides is said to have traversed one hundred and fifty miles on foot in forty-eight hours. But if we think of single feats of strength, feats have been performed in our own day—such as Captain Webb’s swimming across the Straits of Dover—equal to anything recorded from ancient or mediæval times. To swim across the much narrower Hellespont was then deemed a surprising exploit. Nor do we know of any race more to be commended for physical power and vigour of constitution than the American backwoodsmen of Kentucky or Oregon to-day. The swords used by the knights of the fifteenth century have usually handles too small for many a modern English or German hand to grasp.
America’s Mingled Races
Isolated feats do not prove very much, but there is good reason to believe that the average European is as strong as ever he was, and probably more healthy, at least if longevity is a test of health. One may fairly conclude that with better and more abundant food, the average of stature and strength has improved over the world at large, so that in this respect also the force of mankind as a whole has advanced. Whether this advance will continue is more doubtful. In modern industrial communities the law of the survival of the fittest may turn out to be reversed, for it is the poorer and lower sections of the population that marry at an early age, and have the largest families, while prudential considerations keep down the birth-rate among the upper middle-class. In Transylvania, for instance, the Saxons are dying out, because very few children are born to each pair, while the less educated and cultured Rumans increase fast. In North America, the Old New England stock of comparatively pure British blood has begun to be swamped by the offspring of the recent immigrants, mostly Irish or French Canadians; and although the sons of New England, who have gone West, continue to be prolific, it is probable that the phenomena of New England will recur in the Mississippi Valley, and that the newcomers from Europe who form the less cultivated strata of the population—Irish, Germans, Italians, Czechs, Poles, Slovaks, Rumans—will contribute an increasing proportion of the inhabitants. Some of these, and especially the Irish and the Germans and the Scandinavians, are among the best elements in the American population, and have produced men of the highest distinction. But the average level among them of versatile aptitude and of intellectual culture is slightly below that of the native Americans.