That a pioneer of reform who puts his ideas into practice may be a dangerous example is certain. It is possible to be fully convinced of the future of, for instance, the art of flying, without therefore denying the dangers of experiment or encouraging people to jump off church-towers with nothing but a pair of goose-wings on their shoulders. No thorough reshaping of emotions and customs takes place according to dogmas and programmes; this one least of all. But no other motive power exists which will finally induce all—the small and the great, the weak and the strong— to follow the line of development, except the increased freedom of choice of personal love, with a correspondingly increased certainty as regards the influence of that choice upon the welfare of the race. For unless love continued to be the condition of morality, the cause of selection, the new humanity would gradually lose advantages already gained. Neither the “breeding institute” nor “freedom of pairing” is capable of enhancing the spiritual and bodily resources of mankind in a universal, permanent, and organic way. Love alone can do this. It is true that it has yet to be proved that love—other conditions being equal—produces the best children. But this will one day be proved. This knowledge is for the present only intuition. But so are all truths in the beginning. Moreover, possibilities of indirect proof are not wanting even now. First and foremost this, that love has not its origin in human life, and is not a product of civilisation, but shows itself already in the animal world. Among animals it is capable of resulting in death from sorrow at the loss of a mate, as also in other emotional phenomena of human life. It may even lead to monogamy, although with animals as with human beings monogamy is neither a necessary result of love nor an indispensable condition of development. For many of the higher species of animals are polygamous, while others, below them in the scale, are monogamous. If love did not involve any great advantage, it might doubtless have arisen, but would not have persisted, in the face of the hindrances which its personal selection appears to put in the way of the maintenance of the race. Mankind has thus already brought the emotion of love from its primitive animal stem and grafted it upon the tree of civilisation. It has gradually been ennobled and exalted into one of the highest powers of human life. And how would this growing importance of love be possible, if it enhanced only the happiness of the individual, and not also the life of the race? The evolution of human love has shown itself partly in an increasingly definite individualisation in selection, partly in a more complete admission and enhancement of individual qualities.