Hitherto we have mainly concerned ourselves with broad aspects of theory, endeavouring to prove that conscious race-culture is a necessity for any civilisation which is to endure, and to show how alone it can be effected. But evidently for a great many of the practical proposals that might be, and for not a few that have been, based upon these views, public opinion is not ripe. We may be thankful to believe that for some it will never be ripe: it would be rotten first. Marriage, for instance, we hold sacred and essential: we find intolerable the idea of the human stud-farm; we are very dubious as to the help of surgery; we are much more than dubious as to the lethal chamber. It is necessary to be reasonable, and, in seeking the superman, to remain at least human. Now if we are to achieve any immediate success we must clearly divide our proposals, as the present writer did some years ago, with Mr. Galton's approval, into two classes: _positive eugenics_ and _negative eugenics_. The one would seek to encourage the parenthood of the worthy, the other to discourage the parenthood of the unworthy. Positive eugenics is the original eugenics, but, as the writer endeavoured to show at the time, negative eugenics is one with it in principle. The two are complementary, and are both practised by Nature: natural selection is one with natural rejection. To choose is to refuse. In regard to positive eugenics I, for one, must ever make the criticism that I cannot believe in the propriety of attempting to bribe into parenthood people who have no love of children: we have to consider the parental environment of the children we desire, as well as their innate quality. Thus, positive eugenics must largely take the form, at present, of removing such disabilities as now weigh upon the desirable members of the community, especially of the more prudent sort. For instance, it was recently pointed out by a correspondent of the _Morning Post_ that in Great Britain, despite the alarm caused by the decreasing marriage-rate, no one has protested against--