These men build homes in the upper world where are installed their wives, who beget them children in lawful wedlock; they likewise build homes in the lower world, where are installed their concubines, who beget them children in unlawful wedlock. The wives move, have their being in the upper world and sustain to their husbands certain well-defined rights and relations, social and legal. The children of this union sustain to those fathers equally clear and definite rights and relations in the eye of the law, in the eye of society. The law, society, imposes on them, these husbands and fathers, certain well-defined duties and obligations in respect to these children, these wives, which may not be evaded or violated with impunity. These men cannot therefore disown or desert their wives and children at will. Whereas, such is not the case, is not the situation, in respect to the unlawful wives hidden away in a corner of the under-world, or of that of the children begotten to those men by these unlawful wives, but quite the contrary. For them the law, society, does not intervene, does not establish any binding relations, any reciprocal rights between those women and children and the men, any more than if the men and the women were living together in a state of nature and having children born to them in such a state, where the will of the natural man is law, where his sexual passion measures exactly the extent and the duration of his duties and obligations in respect to his offspring and the mother of them. When he grows weary of the mother he goes elsewhere, and forgets that he ever had children by her. This is the case, is the situation, in the under-world of the under race. For down there, there is no law, no public opinion, to curb the gratification of the sexual instinct of the men of the upper world, such as exists and operates so effectively to curb those instincts in that upper world. In the upper world these men may have but one wife each, but in the lower one they may have as many concubines as they like, and a different set of children by each concubine. They may have these women and children in succession, or they may have them at the same time. For there is in that under-world no law, no effective power to say to those men, to their lust of the flesh: "Thus far and no farther." In the upper world they are members of a civilized society, amenable to its codes of law and morals; in the lower one, they are merely male animals struggling with other male animals for the possession of the females. On the dim stage of the under-world this is the one part that they play. In this one sensual role they make their entrances and their exits. They may have in the upper world achieved distinction along other lines of human endeavor, but in the lower one, they achieve the single distinction of being successful male animals in pursuit of the females.