Few propositions are so lacking in proof as that monogamy is the form of sexual life which is indispensable to the vitality and culture of nations. Neither history nor ethnography need be appealed to against an assertion which is sufficiently refuted by the fact that _monogamy_, according to our strict definition above, _has never yet been a reality even among the Christian nations_, except for a minority of individuals; that all the progress that is ascribed to Christian civilisation has taken place while monogamy was indeed the law but polygamy the custom. During the period which is rhetorically alluded to as that of “virtue and manliness,” the days of heathenism in the North, those laws and customs prevailed which now—after a thousand years’ further refinement of the emotional life under Christianity—are regarded as involving the dissolution of society! Our excellent forefathers, whose morals seem so greatly to have outshone our own, were all born in civil matrimony and brought up in homes where not infrequently the concubine lived by the same hearth as the wife, and where the latter was liable to be repudiated for reasons as trivial as those for which she might herself obtain divorce. Indeed, these ancestors were sometimes the offspring of a “free love” which found a home in the wilderness when the guardian had forbidden the lawful union of a loving couple. The introduction by the Catholic Church of an indissoluble marriage tie did not prevent the people from narrowly escaping ruin in the Middle Ages. No one, again, will give to eighteenth-century France the credit for monogamous morality. Nevertheless, France retained vitality enough to determine the history of Europe by her economical, intellectual, and military power. And, in spite of its erotic “immorality,” the heart of the French nation still possesses a great reserve of health and tenacity, together with excellent civic virtues and powers of work. Those who are so fond of asserting that monogamy and indissoluble marriage determine the existence of nations, are either ignorant of the past history and present condition of the nations, or conceal their knowledge behind the prejudiced view that the white humanity of Europe is to be taken as the criterion for the morality as well as for the faith of the whole race.