The difficulty of the problem of marriage--Facts to be considered--Marriage and the family among the animals--Among primitive peoples--Progress from lower to higher forms of the sexual association--An examination of the purpose of marriage--The fear of hasty reforms--Practical morality--Marriage an institution older than mankind--The practical moral ends of marriage--The racial and individual factors--No real antagonism between the two--What is good for the individual must react also for the benefit of the race--Various systems of marriage--Monogamy the form that has prevailed--The higher law of the true marriage--Conventional monogamic marriage--Its failure in practical morality--Coexistence with polygamy and prostitution--Chief grounds for the reform of marriage--An indictment by Mr. Wells--Our marriage system based upon the rights of property--This not necessarily evil--The Egyptian marriage contracts--The Roman marriage--The influence of Christianity--Asceticism and the glorification of virginity--Confusions and absurdities--The failure of our sexual morality--Mammon marriages--Sins against the race--Two examples from my own experience--The iniquity of our bastardy laws--The waste of love--Free-love--Its failure as a practical solution--The reform of marriage--The tendency to place the form of the sexual relationship above the facts of love--The dependence of the consciousness of duty upon freedom--The sexual responsibility of women. II.--_Divorce_ Traditional morality--Practical conditions of divorce--The moral code--This must be modified to meet new conditions--The enforced continuance of an unreal marriage--This the grossest form of immorality--The barbarism of our divorce laws--The action of the Church and State--Confusion and absurdities--Divorce relief from misfortune, not a crime--Personal responsibility in marriage--A recognition of the equality of the mother with the father--Sanction by the State of free divorce--The example of Egypt and Babylon--The Roman divorce by consent--The condemnation of free divorce not the outcome of true morality--The immorality of indissoluble marriage--Loyalty and duty in love--The claims of the child--One advantage of free divorce--Adoption of children under the State--Growing disinclination against coercive marriage--The waste to the race--Our responsibility to the future. III.--_Prostitution_