That, briefly, is the scope of the science of eugenics, as its founder, Sir Francis Galton, conceived it. "Now that this new animal, man, finds himself somehow in existence, endowed with a little power and intelligence," Galton wrote 30 years ago, "he ought, I submit, to awake to a fuller knowledge of his relatively great position, and begin to assume a deliberate part in furthering the great work of evolution. He may infer the course it is bound to pursue, from his observation of that which it has already followed, and he might devote his modicum of power, intelligence and kindly feeling to render its future progress less slow and painful. Man has already furthered evolution very considerably, half consciously, and for his own personal advantages, but he has not yet risen to the conviction that it is his religious duty to do so, deliberately and systematically." But, it may well be asked, how does this sudden need for eugenics arise, when the world has gone along without it for hundreds of millions of years in the past, and the human race has made the great ascent from an ape-like condition in spite of the fact that such a science as eugenics was never dreamed of? For answer recall that natural selection, which is mainly responsible for bringing man to his present situation, has worked chiefly through a differential death-rate. The less fit die: the more fit survive. In the earlier stages of society, man interfered little with natural selection. But during the last century the increase of the philanthropic spirit and the progress of medicine have done a great deal to interfere with the selective process. In some ways, selection in the human race has almost ceased; in many ways it is actually reversed, that is, it results in the survival of the inferior rather than the superior. In the olden days the criminal was summarily executed, the weakly child died soon after birth through lack of proper care and medical attention, the insane were dealt with so violently that if they were not killed by the treatment they were at least left hopelessly "incurable" and had little chance of becoming parents. Harsh measures, all of these, but they kept the germ-plasm of the race reasonably purified. To-day, how is it? The inefficients, the wastrels, the physical, mental, and moral cripples are carefully preserved at public expense. The criminal is turned out on parole after a few years, to become the father of a family. The insane is discharged as "cured," again to take up the duties of citizenship. The feeble-minded child is painfully "educated," often at the expense of his normal brother or sister. In short, the undesirables of the race, with whom the bloody hand of natural selection would have made short work early in life, are now nursed along to old age.