Accepting it as a fact that in the families of our higher classes the average number is distinctly smaller than in the families of our lower classes, let us look for a moment at some of the causes creating this difference. First, in the higher classes men may have mistresses whose children are unacknowledged; and frequently they form the marriage tie with heiresses whose hereditary tendency is necessarily—as expounded by Francis Galton—towards sterility. Second, women of the higher classes are often delicate. They cannot support the strain of frequent maternity. Is this a condition that, in an advancing civilization, will persist? By no means. The ideal of womanhood, as of manhood, points to strength, not weakness—“a combination of brain power and skill with bodily health and vigour. Many intellectual men are physically robust and capable in a polygamous state of patriarchal propagation.” (_Over-population_, John M. Robertson.) And it is impossible to doubt that a rational education, embracing free play to activities hitherto denied to the sex, and promoting physical development, will lift women to a superior level of health and of physiological capacity. Third, the higher classes avail themselves to some extent of neo-Malthusian preventive checks, whereas the mass of the people are either ignorant of them or opposed to their use. Fourth, enforced celibacy in the case of a large proportion of women of the cultured classes is a cause of relatively fewer numbers. Obviously it is from the “warrens of the poor” that prolific life persistently springs. There we have the highest rate of genesis; and as the refined restrain propagation and limit their numbers, the poor enter the breach and fill up the ranks from their own inferior stock. Now, mark the result. The individuating process is checked, and ultimately fails, through the crowding out of the individuated. What occurs, naturally, inevitably, by the action of the process is a gradual subsidence, finally a limiting of the individuating factor, the very social force to which Herbert Spencer directs attention! Surely it suffices to point out “that no theory of the ultimate effects of mere refinement on rate of increase can give us help while nine-tenths of the human race are not refined, and not visibly in the way of becoming so.” (_Over-population_, John M. Robertson.) We are compelled to dismiss Herbert Spencer’s “law of population” as irrelevant to the situation, and to declare that he has no more solved the riddle of the Sphinx than have Malthus, Darwin and Huxley. The population problem, as it faces us to-day, is serious beyond all comparison. It is impossible to over-estimate the importance of finding its true solution. But while thousands of men and women are ready now to admit the seriousness, nowhere as yet has a movement appeared of united action applicable and adequate to the exigency. CHAPTER II THE PROBLEM OF SEX