The duties attached to family property led to the history, which is very strange to the ideas of the present day, of Ruth’s advances to Boaz under the advice of her mother. “It came to pass at midnight” that Boaz “was startled (see marginal note in the Revised Version) and turned himself, and behold a woman lay at his feet,” who had come in “softly and uncovered his feet and laid her down.” He told her to lie still until the early morning and then to go away. She returned home and told her mother, who said, “Sit still, my daughter, until thou know how the matter will fall, for the man will not rest until he have finished the thing this day.” She was right. Boaz took legal steps to disembarrass himself of the claims of a still nearer kinsman, “who drew off his shoe”; so Boaz married Ruth. Nothing could be purer from the point of view of those days, than the history of Ruth. The feelings of the modern social world would be shocked if the same thing were to take place now in England. Evidence from the various customs relating to endogamy show how choice in marriage may be dictated by religious custom. That is, by a custom founded on a religious view of family property and family descent. Eugenics deal with what is more valuable than money or lands, namely the heritage of a high character, capable brains, fine physique, and vigour; in short, with all that is most desirable for a family to possess as a birthright. It aims at the evolution and preservation of high races of men, and it as well deserves to be strictly enforced as a religious duty, as the Levirate law ever was.