faith in the practicability of their proposals. But how about that large mass of the physically and mentally normal who live at the subsistence-level, and whose progeny, if economic pressure tighten a little, are likely to be forced down into the class of underfed beings, dulled and brutalized by poverty, from whose ranks our paupers, imbeciles and criminals are largely recruited? To ignore the existence of this perennial source of unfitness is levity. To recognize it, and to assume that it results from over-propagation is to assume at the same time that the earth’s population is too numerous for comfortable subsistence on the amount of cultivable land in existence. If this disproportion be real, the only hope lies in persuading this class to limit its offspring voluntarily to the number that the earth’s surface will comfortably support. If it be only an apparent disproportion due to an artificial shortage of land created by monopoly, then the eugenist’s program amounts simply to a recommendation that the population be somehow restricted to the number that can get subsistence on the terms of the monopolist. Henry George has conclusively disproved the validity of the Malthusian theory which underlies the assumption of over-population, while Oppenheimer’s figures show that if land were freely available for use, the earth’s present population might easily be supported on one-third of its arable surface.[18] Here, really, is the most convincing answer to the standard arguments for birth-control; yet so far as I know, the opponents of birth-control have never done much with it, whether out of ignorance or because of the profound economic readjustments that it implies. The eugenist, too, generally displays a constitutional aversion to attacking the problem of unfitness at the right end--which is, to inquire, first of all, why it exists. Hence the ineptitude of his proposals for social betterment: they would involve much unwieldy governmental machinery and considerably more intelligence than any State has ever displayed in dealing with social questions; and they would attack only the results of our social ills, leaving the causes freely operative.[19]