The ablest race of whom history bears record is unquestionably the ancient Greek, partly because their masterpieces in the principal departments of intellectual activity are still unsurpassed and in many respects unequaled, and partly because the population that gave birth to the creators of those masterpieces was very small. Of the various Greek sub-races, that of Attica was the ablest, and she was no doubt largely indebted to the following cause for her superiority: Athens opened her arms to immigrants, but not indiscriminately, for her social life was such that none but very able men could take any pleasure in it; on the other hand, she offered attractions such as men of the highest ability and culture could find in no other city. Thus by a system of partly unconscious selection she built up a magnificent breed of human animals, which in the space of one century—viz., between 530 and 430 B. C.—produced the following illustrious persons, fourteen in number:—
Statesmen and Commanders.—Themistocles (mother an alien), Miltiades, Aristides, Cimon (son of Miltiades), Pericles (son of Xanthippus, the victor at Mycale).
Literary and Scientific Men.—Thucydides, Socrates, Xenophon, Plato.
Poets.—Æschylus, Sophocles, Euripides, Aristophanes.
Sculptor.—Phidias.
We are able to make a closely approximate estimate of the population that produced these men, because the number of the inhabitants of Attica has been a matter of frequent inquiry, and critics appear at length to be quite agreed in the general results.... The average ability of the Athenian race is, on the lowest possible estimate, very nearly two grades higher than our own—that is, about as much as our race is above that of the African negro. This estimate, which may seem prodigious to some, is confirmed by the quick intelligence and high culture of the Athenian commonalty, before whom literary works were recited, and works of art exhibited, of a far more severe character than could possibly be appreciated by the average of our race, the calibre of whose intellect is easily gauged by a glance at the contents of a railway book-stall.
We know, and may guess something more, of the reason why this marvelously gifted race declined. Social morality grew exceedingly lax; marriage became unfashionable, and was avoided; many of the more ambitious and accomplished women were avowed courtesans and consequently infertile, and the mothers of the incoming population were of a heterogeneous class. In a small sea-bordered country, where emigration and immigration are constantly going on, and where the manners are as dissolute as were those of Greece in the period of which I speak, the purity of a race would necessarily fail. It can be therefore no surprise to us, though it has been a severe misfortune to humanity, that the high Athenian breed decayed and disappeared; for if it had maintained its excellence, and had multiplied and spread over large countries, displacing inferior populations (which it well might have done, for it was exceedingly prolific), it would assuredly have accomplished results advantageous to human civilization, to a degree that transcends our powers of imagination.
If we could raise the average standard of our race only one grade, what vast changes would be produced! The number of men of natural gifts equal to those of the eminent men of the present day would be necessarily increased more than tenfold;... but far more important to the progress of civilization would be the increase in the yet higher orders of intellect. We know how intimately the course of events is dependent on the thoughts of a few illustrious men. If the first-rate men in the different groups had never been born, even if those among them who have a place in my appendices on account of their hereditary gifts had never existed, the world would be very different to what it is....
It seems to me most essential to the well-being of future generations, that the average standard of ability of the present time should be raised. Civilization is a new condition imposed upon man by the course of events, just as in the history of geological changes new conditions have continually been imposed on different races of animals. They have had the effect either of modifying the nature of the races through the process of natural selection, whenever the changes were sufficiently slow and the race sufficiently pliant, or of destroying them altogether, when the changes were too abrupt or the race unyielding. The number of the races of mankind that have been entirely destroyed under the pressure of the requirements of an incoming civilization, reads us a terrible lesson. Probably in no former period of the world has the destruction of the races of any animal whatever been effected over such wide areas, and with such startling rapidity, as in the case of savage man. In the North-American continent, in the West-Indian islands, in the Cape of Good Hope, in Australia, New Zealand, and Van Diemen's Land, the human denizens of vast regions have been entirely swept away in the short space of three centuries, less by the pressure of a stronger race than through the influence of a civilization they were incapable of supporting. And we too, the foremost laborers in creating this civilization, are beginning to show ourselves incapable of keeping pace with our own work. The needs of centralization, communication, and culture, call for more brains and mental stamina than the average of our race possess. We are in crying want for a greater fund of ability in all stations of life; for neither the classes of statesmen, philosophers, artisans, nor laborers are up to the modern complexity of their several professions. An extended civilization like ours comprises more interests than the ordinary statesmen or philosophers of our present race are capable of dealing with, and it exacts more intelligent work than our ordinary artisans and laborers are capable of performing. Our race is overweighted, and appears likely to be drudged into degeneracy by demands that exceed its powers....
When the severity of the struggle for existence is not too great for the powers of the race, its action is healthy and conservative; otherwise it is deadly, just as we may see exemplified in the scanty, wretched vegetation that leads a precarious existence near the summer snow line of the Alps, and disappears altogether a little higher up. We want as much backbone as we can get, to bear the racket to which we are henceforth to be exposed, and as good brains as possible to contrive machinery, for modern life to work more smoothly than at present. We can in some degree raise the nature of man to a level with the new conditions imposed upon his existence; and we can also in some degree modify the conditions to suit his nature. It is clearly right that both these powers should be exerted, with the view of bringing his nature and the conditions of his existence into as close harmony as possible.