This explanation of racial differences seems the more acceptable, when we take into consideration the immense period which has elapsed since man began to spread over the earth, and the slow and gradual change of abodes. He was not at once moved from the tropics to the polar zones, or from the polar zones to the tropics, but had to undergo an indefinitely long chain of adaptive processes. Thus were gradually established such radical differences as those which distinguish a European from a negro, an Australian from a Red-skin.
We have now found an answer to our question, why man, in the choice of mate, gives the preference to the best representatives of his race. The full development of racial characters indicates health, a deviation from them indicates disease. Physical beauty is thus in every respect the outward manifestation of physical perfection, or healthiness, and the development of the instinct which prefers beauty to ugliness is evidently within the power of natural selection.
This explanation of the connection between love and beauty, as also of the origin of the races of men, is very different from that given by Mr. Darwin. “The men of each race,” he says, “prefer what they are accustomed to; they cannot endure any great change; but they like variety, and admire each characteristic carried to a moderate extreme.... As the great anatomist Bichat long ago said, if every one were cast in the same mould, there would be no such thing as beauty. If all our women were to become as beautiful as the Venus de’ Medici, we should for a time be charmed; but we should soon wish for variety, and as soon as we had obtained variety, we should wish to see certain characters a little exaggerated beyond the then existing common standard.”[1616]
In the fashions of our own dress, says Mr. Darwin, we see exactly the same principle and the same desire to carry every point to an extreme.[1617] Man prefers, to a certain extent, what he is accustomed to see. Thus the Maoris, who are in the habit of dyeing their lips blue, consider it “a reproach to a woman to have red lips;”[1618] and we ourselves dislike, on the whole, any great deviation from the leading fashions. But, on the other hand, man wants variety. Now in one, now in another way, he changes his dress in order to attract attention, or to charm. The fashions of savages are certainly more permanent than ours;[1619] but the extreme diversity of ornaments with which many uncivilized peoples bedeck themselves, shows their emulation to make themselves attractive by means of new enticements. “Each of the Outanatas (New Guinea),” says Mr. Earl, “seemed desirous of ornamenting himself in some way different from his neighbour;”[1620] and, with regard to the Pacific Islanders, Mr. John Williams remarks that “the inhabitants of almost every group ... have their peculiar ideas as to what constitutes an addition to beauty.”[1621] But it is impossible to believe that the different races’ ideal of personal beauty are in any way connected with this capriciousness of taste. Were this the case, as Mr. Darwin suggests, the men of each race would admire variations and piquant peculiarities in the appearance of their women, and not only each characteristic point “carried to a moderate extreme.”
According to Mr. Darwin, racial differences are due to the different standards of beauty, whereas, according to the theory here indicated, the different standards of beauty are due to racial differences. “Let us suppose,” says Mr. Darwin, “the members of a tribe, practising some form of marriage, to spread over an unoccupied continent, they would soon split up into distinct hordes, separated from each other by various barriers, and still more effectually by the incessant wars between all barbarous nations. The hordes would thus be exposed to slightly different conditions and habits of life, and would sooner or later come to differ in some small degree. As soon as this occurred, each isolated tribe would form for itself a slightly different standard of beauty; and then unconscious selection would come into action through the more powerful and leading men preferring certain women to others. Thus the differences between the tribes, at first very slight, would gradually and inevitably be more or less increased.”[1622] This theory—that racial differences are due to sexual selection—obviously presupposes either that the human organism is alike well fitted to any climate and natural conditions; or that no correlation exists between the visible parts of the body and its functions. Otherwise, of course, little effect could be produced through the preference given to certain individuals; for in a savage state, where celibacy is an exception, those men and women whose constitution was best suited to the conditions of life would, in any case, in the end, determine the racial type. It is also difficult to see how those slight variations from the original human type, which, according to Mr. Darwin, characterized the distinct hordes or tribes into which mankind was split up, could have developed into such enormous differences as we find in the colour of the skin of, for example, a negro and a European—only through the selection of the best representatives of these tribal peculiarities, these slight variations. Finally, it seems doubtful whether Mr. Darwin would have ascribed racial differences in colour to the influence of sexual selection, had he considered the important fact, already mentioned, that the larger apes have the same colour of the skin as the human races living in the same country.
Mr. Darwin also thinks that the differences in external appearance between man and the lower animals are, to a certain extent, due to sexual selection. The chief character of the human race which he proposes to account for in this way is the general hairlessness of the body. “No one supposes,” he says, “that the nakedness of the skin is any direct advantage to man; his body therefore cannot have been divested of hair through natural selection.”[1623] It is curious that the hairlessness of man has puzzled so many anthropologists,[1624] as it may very easily be explained by the law of variation. When man had invented the art of making fire, and the idea of covering himself to secure protection from cold had occurred to his mind, hairlessness was no serious disadvantage in the struggle for existence. Hence natural selection ceased to operate in the matter, and a hairless race gradually arose. We find the same principle at work in various other ways. Civilized man does not need such keen vision as savages;[1625] consequently many of us are short-sighted and few Europeans could match a Red Indian in his power of detecting the symptoms of a trail. For the same reason we are generally inferior to savages in the capacity for discriminating odours, and our teeth are apt to be very much less sound and vigorous than theirs.
That sexual selection has had some influence on the physical aspect of mankind is probable. Accurate observers in different parts of the world have remarked that personal deformities are very rare in savage races unaffected by European influence.[1626] This chiefly depends upon the fact that deformed individuals seldom survive the hardships of early life, but, as Sir W. Lawrence says, if they do survive, they are prevented by the kind of aversion they inspire from propagating their deformities.[1627] It is not unlikely that the selection of the best representatives of the race contributes to keep the racial type pure. Sexual selection, too, may be the cause why, among savages, the men are so often handsomer than the women—that is, better specimens of their sex and their race;[1628] whilst, in civilized society, the reverse is true. We have seen that savage women have great liberty of disposing of their own hand, and that, at lower stages of civilization, celibacy occurs almost exclusively among the men. Among us, on the contrary, the unmarried women outnumber the unmarried men, and, whilst a man’s ability to marry depends only to a small extent upon his personal appearance, the like may certainly not be said of women.