Self-interest drove men into military combination--where they learned much. Family interest drove them into industrial activity, and even allowed a low form of combination. But social interest is what leads us all farthest and highest; the impulse to live, not for self-preservation only, not for reproduction only, but for social progress. It should not be hard to see that these apparently dissimilar and opposed interests can only be harmonised by the dominance of the greatest. The man who would strive for his own advantage at the expense of his family, we call a brute. The man who strives for the advantage of his family at the expense of his country--we should call a traitor! Yet this is the common attitude of the citizen of to-day, and in this attitude he is maintained and extolled by the home! The soldier who would seek to save his own life to the injury of the army we promptly shoot. If he should seek to save his home at the same risk, we should still dishonour and punish him. The army, very highly developed in a very low scheme of action, knows that neither self nor family must stand for a moment against the public service. Industry is not so well organised as warfare, and so our scale of industrial virtues is not so high. We degrade and punish for "conduct unbecoming an officer and a gentleman"; but we take no cognisance of "conduct unbecoming a manufacturer and a gentleman," unless he is an open malefactor. Yet a manufacturer is a far higher and more valuable social servant than a soldier of any grade. We do not yet know the true order of importance in our social functions, nor their distinctly organic nature. With our proven capacity, why do we manifest so little progress in industrial organisation and devotion? A student of prehuman evolution, one familiar only with nature's long, slow, stumbling process of developing by exclusion--like driving a flock of sheep by killing those who went the wrong way--might answer the question in this manner: That we have not been engaged in industrial processes long enough to develop the desired qualities. This is usually considered the evolutionary standpoint; and from it we are advised not to be impatient, and are told that a few thousand years' more killing will do much for us. But social evolution takes place on quite other grounds. We have added education to heredity; mutual help to the cruel and wasteful processes of elimination. The very essence of social relation is its transmission of individual advance to the collective. Physical evolution acts only through physical heredity; we have that in common with all animals; but we have also social heredity, that great psychic current of transmitted wisdom and emotion which immortalises the gains of the past and generalises the gains of the present. A system of free public education does more to develop the brains of a people than many thousand years of "natural selection," and does not prevent natural selection, either.