Mating determined by unconscious psychological motives instead of eugenic considerations; Some of the best male and female stock refusing marriage and parenthood; The race is reproduced largely by the inferior and average stocks and very little by the superior stock; As a therapeutic measure, society should utilize psychological knowledge as a new method of control; Romantic love and conjugal love--a new ideal of love; The solution of the conflict between individual and group interests. From the viewpoint of group welfare, the present psychological situation of human reproductive activities undoubtedly has its detrimental aspects. As we have seen, the choice of a mate is determined by irrational motives which lie far below the levels of consciousness. These unconscious factors which govern sexual selection far outweigh the more rational considerations of modern eugenic thought. The marks of personal beauty around which romantic love centres and which therefore play a prominent part in mating are not necessarily indicative of physical and mental health that will insure the production of sound offspring. The modern standards of beauty (at least in so far as feminine loveliness is concerned) have gone far from the ancient Grecian type of physical perfection. Influenced perhaps by the chivalric ideals of "the lady," the demand is rather for a delicate and fragile prettiness which has come to be regarded as the essence of femininity. The robust, athletic girl must preserve this "feminine charm" in the midst of her wholesome outdoor life, else she stands in great danger of losing her erotic attraction. Surface indications of the truth of this statement are easily discovered. The literature which before the war ran riot with athletic heroines pictured them with wind-blown hair and flushed cheeks receiving the offer of their male companion's heart and hand. The golf course or the summer camp was simply a charming new setting for the development of the eternal love theme. Even fashion has conspired to emphasize the feminine charm of the girl who goes in for sports, as a glance at the models of bathing costumes, silken sweaters, and graceful "sport" skirts plainly reveals. Just as the love which is directed in accordance with an emotional reaction conditioned to respond to some erotic fetishism or to a parent ideal may be productive of individual unhappiness, so it is also entirely a matter of chance whether or not it leads to a eugenic mating. Like romantic love, it is quite as apt to focus upon a person who does not conform to eugenic ideals as upon one who does. The mate selected upon the basis of these unconscious motives is very likely to bequeath a neurotic constitution or an otherwise impaired physical organism to the offspring of the union, since those possibilities were not taken into consideration in making the choice.