But the control of reproduction, enormously beneficial as it is even in its most elementary shapes, mainly concerns us here because it furnishes the essential condition for the development of Social Hygiene. The control of reproduction renders possible, and leads on to, a wise selection in reproduction. It is only by such selection of children to be born that we can balance our indiscriminate care in the preservation of all children that are
born, a care which otherwise would become an intolerable burden. It is only by such selection that we can work towards the elimination of those stocks which fail to help us in the tasks of our civilization to-day. It is only by such selection that we can hope to fortify the stocks that are fitted for these tasks. More than two centuries ago Steele playfully suggested that "one might wear any passion out of a family by culture, as skilful gardeners blot a colour out of a tulip that hurts its beauty." 21 The progress of civilization, with the self-control it involves, has made it possible to accept this suggestion seriously. 22 The difference is that whereas the flowers of our gardens are bettered only by the control of an arbitrary external will and intelligence, our human flowers may be bettered by an intelligence and will, a finer sense of responsibility, developed within themselves. Thus it is that human culture renders possible Social Hygiene.
Three centuries ago an inspired monk set forth his ideal of an ennobled world in The City of the Sun. Campanella wrote that prophetic book in prison. But his spirit was unfettered, and his conception of human society, though in daring it outruns all the visions we may compare it with, is yet on the lines along which our civilization lies. In the City of the Sun not only was the nobility of work, even mechanical work,—which Plato rejected and More was scarcely conscious of,—for the first time recognized, but the supreme impulse of procreation was regarded as a sacred function, to be exercised in the light of