Intelligent selection is the means whereby the more intelligent people will bring more of their kind into the world. Instead of killing off the unfit at an early age, as primitive natural selection did, it would simply slow the rate at which the unintelligent breed, while encouraging the intelligent to breed at a higher rate. This is an elementary procedure in the science of husbandry, yet when humans seek to apply it to themselves, they are confronted by a mass of altruistic emotions and attitudes inherited from our distant past. Intelligent selection need not be imposed. Like government with the consent of the governed, it may be employed voluntarily by any group concerned enough and enlightened enough to put it into effect.
Man is self-domesticated.
He can also be self-selecting. It is as though a beneficent Providence, seeing man faltering and beginning to retrogress, chose to reveal to him in his time of need certain secrets of his being, so he might save himself from the biological degradation brought about by his own indiscriminate breeding. Only lack of understanding or downright inertia prevents man from benefiting from his own greatest discovery. We have seen how man has been able to control his environment to such an extent that it acts as a counterforce to natural selection. The resources of intelligent selection, capably utilized, can enable him to rise above the limitations, not only of himself and his environment, but of the evolutionary process itself.