It is said, for instance, or at all events implied, that we need bestow very little care on the conditions of life because such care can have no permanently beneficial effect on the race, since acquired characters, for the most part, are not transmitted to descendants. But to assume that social reform is unnecessary because it is not inherited is altogether absurd. The people who make this assumption would certainly not argue that it is useless for them to satisfy their own hunger and thirst, because their children will not thereby be safeguarded from experiencing hunger and thirst. Yet the needs which the movement of organized social reform seeks to satisfy are precisely on a level with, and indeed to some extent identical with, the needs of hunger and thirst. The impulse and the duty which move every civilized community to elaborate and gratify its own social needs to the utmost are altogether independent of the race, and would not cease to exist even in a community vowed to celibacy or the most absolute Neo-Malthusianism. Nor, again, must it be said that social reform destroys the beneficial results of natural selection.
Here, indeed, we encounter a disputed point, and it may be admitted that the precise data for absolute demonstration in one direction or the other cannot yet be found. Whenever human beings breed in reckless and unrestrained profusion—as is the case under some conditions before a free and self-conscious civilization is attained—there is an immense infantile mortality. It is claimed, on the one hand, that this is beneficial, and need not be interfered with. The weak are killed off, it is said, and the strong survive; there is a process of natural survival of the fittest. That is true. But it is equally true, as has also been clearly seen on the other hand, that though the relatively strongest survive, their relative strength has been impaired by the very influences which have proved altogether fatal