If now we consider that the differences in favor of the females are especially in the liver, the heart, the superrenal glands and the kidneys, we shall come to the conclusion that the greater vitality of the female organisms corresponds to their being better nourished and better purified."[38] III. The superior organization possessed by woman at birth, assuring her throughout her life a much greater vitality, is probably demanded by the part she plays in the production of the species, a part altogether more prolonged and exhausting than that of the man who, when fertilization is accomplished, has no more to do, while then the travail of woman begins, to continue during long months, through pregnancy and after birth. The women of savage tribes suckle their children for two years and more. It sometimes happens that the male pays dear for his inutility; after union, the bees kill the males, and the male spider must hastily take himself off that he may not be devoured by the larger and stronger female. Among the Sakawas, at the annual feast of Mylitta Anaitis, they sacrificed at Babylon the handsome slave who had just united with the priestess who incarnated the Assyrian goddess. This bloody religious ceremonial must have been a reproduction of an Amazonian custom. The life of savagery and barbarism permits woman to develop her superiority from birth; each sex there has its special function; it is the division of labor in embryo. The man, whose muscular system is more developed, "fights, hunts, fishes and sits down," according to the Australian native, he regards all the rest as under the jurisdiction of woman, whose function puts brain activity into play at an earlier epoch. She has charge of the communal house, which often shelters a clan of more than one hundred individuals; she prepares clothing from skins and other raw materials; she charges herself with the cultivation of the garden, the rearing of domestic animals and the manufacture of household utensils; she preserves, economizes, cooks, distributes the provisions, vegetable and animal, which have been gathered during the course of the year; and like the Valkyries of the Scandinavians and the Keres of the pre-Homeric Greeks, she accompanies the warrior on the field battle, aids in the fray, raises him up if he is wounded and cares for him; her assistance is so appreciated that, according to Tacitus, the barbarians who under the leadership of Civilis revolted against Vespasian, were seized with pity for the Roman soldiers because their wives did not accompany them when they marched to combat. Plato likewise who, like the chosen ones initiated in the Eleusinian Mysteries, was more informed regarding ancient customs than is supposed, makes the women to be present in the battles of the warriors of his Republic.