public choice of a fitting mate for marriageable girls. Sometimes the question of fitness resolved itself into one of good looks; occasionally the matter was settled by lot. There was no compulsion about these unions; they were often little more than a game, though at times they involved a degree of immorality which caused the authorities to oppose them. But very frequently the sexual selection thus exerted led to weddings, and these playful Valentine unions were held to be a specially favourable prelude to a happy marriage.
It is scarcely necessary to show how the ancient customs associated with St. Valentine's Day are taken up again and placed on a higher plane by the great movement which is now beginning to shape itself among us. The old Valentine unions were made by a process of caprice tempered more or less by sound instincts and good sense. In the sexual selection of the future the same results will be attained by more or less deliberate and conscious recognition of the great laws and tendencies which investigation is slowly bringing to light. The new St. Valentine will be a saint of science rather than of folk-lore.
Whenever such statements as these are made it is always retorted that love laughs at science, and that the winds of passion blow where they list.9 That, however, is by no means altogether true, and in any case it is far from covering the whole of the ground. It is hard to fight against human nature, but human nature itself is opposed to indiscriminate choice of mates. It is not true that any one tends to love anybody, and that mutual attraction is entirely a matter of chance. The investigations which have lately been carried out show that there are certain definite tendencies in this matter, that certain kinds of people tend to be attracted to certain kinds, especially that like are attracted to like rather than unlike to unlike, and that, again, while some kinds of people tend to be married with special frequency other kinds tend to be left unmarried.10