Müller-Lyer, from the point of view of family institutions, divides the history of civilization into three periods--the clan period, the family period, and the personal period. Of these the last is only now beginning; the other two are each divided into three stages--early, middle, and late. He shows that sexual and family ethics have at all times been dominated by economic considerations; hunting, pastoral, agricultural, and industrial tribes or nations have each their own special kinds of institutions. Economic causes determine whether a tribe will practice polygamy, polyandry, group marriage, or monogamy, and whether monogamy will be lifelong or dissoluble. Whatever the prevailing practice in a tribe it is thought to be the only one compatible with virtue, and all departures from it are regarded with moral horror. Owing to the force of custom it may take a long time for institutions to adapt themselves to economic circumstances; the process of adaptation may take centuries. Christian sexual ethics, according to this author, belong to the middle-family period; the personal period, now beginning, has not yet been embodied in the laws of most Christian countries, and even the late-family period, since it admits divorce under certain circumstances, involves an ethic to which the church is usually opposed. Müller-Lyer suggests a general law to the effect that where the state is strong the family is weak and the position of women is good, whereas where the state is weak the family is strong and the position of women is bad. It is of course obvious that where the family is strong the position of women must be bad, and vice versa, but the connection of these with the strength or weakness of the state is less obvious, though probably in the main no less true. Traditional China and Japan afforded good instances. In both the state was much weaker than in modern Europe, the family much stronger, and the position of women much worse. It is true that in modern Japan the state is very strong, yet the family also is strong and the position of women is bad; but this is a transitional condition. The whole tendency in Japan is for the family to grow weaker and the position of women to grow better. This tendency encounters grave difficulties. I met in Japan only one woman who appeared to be what we should consider emancipated in the West--she was charming, beautiful, high-minded, and prepared to make any sacrifice for her principles. After the earthquake in Tokio the officer in charge of the forces concerned in keeping order in the district where she lived seized her and the man with whom she lived in a free union and her twelve-year-old nephew, whom he believed to be her son; he took them to the police station and there murdered them by slow strangulation, taking about ten minutes over each except the boy. In his account of the matter he stated that he had not had much difficulty with the boy, because he had succeeded in making friends