It has further to be borne in mind that a certain elasticity of the formal side of marriage while, on the one side, it permits variations from the general monogamic order, where such are healthful or needed to restore a balance in natural conditions, on the other hand restrains such variations in so far as they are due to the disturbing influence of artificial constraint. Much of the polygyny, and polyandry also, which prevails among us to-day is an altogether artificial and unnatural form of polygamy. Marriages which on a more natural basis would be dissolved cannot legally be dissolved, and consequently the parties to them, instead of changing their partners and so preserving the natural monogamic order, take on other additional partners and so introduce an unnatural polygamy. There will always be variations from the monogamic order and civilization is certainly not hostile to sexual variation. Whether we reckon these variations as legitimate or illegitimate, they will still take place; of that we may be certain. The path of social wisdom seems to lie on the one hand in making the marriage relationship flexible enough to reduce to a minimum these deviations—not because such deviations are intrinsically bad but because they ought not to be forced into existence—and on the other hand in according to these deviations when they occur such a measure of recognition as will deprive them of injurious influence and enable justice to be done to all the parties concerned. We too often forget that our failure to recognize such variations merely means that we accord in such cases an illegitimate permission to perpetrate injustice. In those parts of the world in which polygyny is recognized as a permissible variation a man is legally held to his natural obligations towards all his sexual mates and towards the children he has by those mates. In no part of the world is polygyny so prevalent as in Christendom; in no part of the world is it so easy for a man to escape the obligations incurred by polygyny. We imagine that if we refuse to recognize the fact of polygyny, we may refuse to recognize any obligations incurred by polygyny. By enabling a man to escape so easily from the obligations of his polygamous relationships we encourage him, if he is unscrupulous, to enter into them; we place a premium on the immorality we loftily condemn.[[373]] Our polygyny has no legal existence, and therefore its obligations can have no legal existence. The ostrich, it was once imagined, hides its head in the sand and attempts to annihilate facts by refusing to look at them; but there is only one known animal which adopts this course of action, and it is called Man.

Monogamy, in the fundamental biological sense, represents the natural order into which the majority of sexual facts will always naturally fall because it is the relationship which most adequately corresponds to all the physical and spiritual facts involved. But if we realize that sexual relationships primarily concern only the persons who enter into those relationships, and if we further realize that the interest of society in such relationships is confined to the children which they produce, we shall also realize that to fix by law the number of women with whom a man shall have sexual relationships, and the number of men with whom a woman shall unite herself, is more unreasonable than it would be to fix by law the number of children they shall produce. The State has a right to declare whether it needs few citizens or many; but in attempting to regulate the sexual relationships of its members the State attempts an impossible task and is at the same time guilty of an impertinence.

There is always a tendency, at certain stages of civilization, to insist on a merely formal and external uniformity, and a corresponding failure to see not only that such uniformity is unreal, but also that it has an injurious effect, in so far as it checks beneficial variations. The tendency is by no means confined to the sexual sphere. In England there is, for instance, a tendency to make building laws which enjoin, in regard to places of human habitation, all sorts of provisions that on the whole are fairly beneficial, but which in practice act injuriously, because they render many simple and excellent human habitations absolutely illegal, merely because such habitations fail to conform to regulations which, under some circumstances, are not only unnecessary, but mischievous.

Variation is a fact that will exist whether we will or no; it can only become healthful if we recognize and allow for it. We may even have to recognize that it is a more marked tendency in civilization than in more primitive social stages. Thus Gerson argues (Sexual-Probleme, Sept., 1908, p. 538) that just as the civilized man cannot be content with the coarse and monotonous food which satisfies the peasant, so it is in sexual matters; the peasant youth and girl in their sexual relationships are nearly always monogamous, but civilized people, with their more versatile and sensitive tastes, are apt to crave for variety. Sénancour (De l'Amour, vol. ii, "Du Partage," p. 127) seems to admit the possibility of marriage variations, as of sharing a wife, provided nothing is done to cause rivalry, or to impair the soul's candor. Lecky, near the end of his History of European Morals, declared his belief that, while the permanent union of two persons is the normal and prevailing type of marriage, it by no means follows that, in the interests of society, it should be the only form. Remy de Gourmont similarly (Physique de l'Amour, p. 186), while stating that the couple is the natural form of marriage and its prolonged continuance a condition of human superiority, adds that the permanence of the union can only be achieved with difficulty. So, also, Professor W. Thomas (Sex and Society, 1907, p. 193), while regarding monogamy as subserving social needs, adds: "Speaking from the biological standpoint monogamy does not, as a rule, answer to the conditions of highest stimulation, since here the problematical and elusive elements disappear to some extent, and the object of attention has grown so familiar in consciousness that the emotional reactions are qualified. This is the fundamental explanation of the fact that married men and women frequently become interested in others than their partners in matrimony."

Pepys, whose unconscious self-dissection admirably illustrates so many psychological tendencies, clearly shows how—by a logic of feeling deeper than any intellectual logic—the devotion to monogamy subsists side by side with an irresistible passion for sexual variety. With his constantly recurring wayward attraction to a long series of women he retains throughout a deep and unchanging affection for his charming young wife. In the privacy of his Diary he frequently refers to her in terms of endearment which cannot be feigned; he enjoys her society; he is very particular about her dress; he delights in her progress in music, and spends much money on her training; he is absurdly jealous when he finds her in the society of a man. His subsidiary relationships with other women recur irresistibly, but he has no wish either to make them very permanent or to allow them to engross him unduly. Pepys represents a common type of civilized "monogamist" who is perfectly sincere and extremely convinced in his advocacy of monogamy, as he understands it, but at the same time believes and acts on the belief that monogamy by no means excludes the need for sexual variation. Lord Morley's statement (Diderot, vol. ii, p. 20) that "man is instinctively polygamous," can by no means be accepted, but if we interpret it as meaning that man is an instinctively monogamous animal with a concomitant desire for sexual variation, there is much evidence in its favor.

Women must be as free as men to mould their own amatory life. Many consider, however, that such freedom on the part of women will be, and ought to be, exercised within narrower limits (see, e.g., Bloch, Sexual Life of Our Time, Ch. X). In part this limitation is considered due to the greater absorption of a woman in the task of breeding and rearing her child, and in part to a less range of psychic activities. A man, as G. Hirth puts it, expressing this view of the matter (Wege zur Liebe, p. 342), "has not only room in his intellectual horizon for very various interests, but his power of erotic expansion is much greater and more differentiated than that of women, although he may lack the intimacy and depth of a woman's devotion."

It may be argued that, since variations in the sexual order will inevitably take place, whether or not they are recognized or authorized, no harm is likely to be done by using the weight of social and legal authority on the side of that form which is generally regarded as the best, and, so far as possible, covering the other forms with infamy. There are many obvious defects in such an attitude, apart from the supremely important fact that to cast infamy on sexual relationships is to exert a despicable cruelty on women, who are inevitably the chief sufferers. Not the least is the injustice and the hampering of vital energy which it inflicts on the better and more scrupulous people to the advantage of the worse and less scrupulous. This always happens when authority exerts its power in favor of a form. When, in the thirteenth century, Alexander III—one of the greatest and most effective potentates who ever ruled Christendom—was consulted by the Bishop of Exeter concerning subdeacons who persisted in marrying, the Pope directed him to inquire into the lives and characters of the offenders; if they were of regular habits and staid morality, they were to be forcibly separated and the wives driven out; if they were men of notoriously disorderly character, they were to be permitted to retain their wives, if they so desired (Lea, History of Sacerdotal Celibacy, third edition, vol. i, p. 396). It was an astute policy, and was carried out by the same Pope elsewhere, but it is easy to see that it was altogether opposed to morality in every sense of the term. It destroyed the happiness and the efficiency of the best men; it left the worst men absolutely free. To-day we are quite willing to recognize the evil result of this policy; it was dictated by a Pope and carried out seven hundred years ago. Yet in England we carry out exactly the same policy to-day by means of our separation orders, which are scattered broadcast among the population. None of the couples thus separated—and never disciplined to celibacy as are the Catholic clergy of to-day—may marry again; we, in effect, bid the more scrupulous among them to become celibates, and to the less scrupulous we grant permission to do as they like. This process is carried on by virtue of the collective inertia of the community, and when it is supported by arguments, if that ever happens, they are of an antiquarian character which can only call forth a pitying smile.

It may be added that there is a further reason why the custom of branding sexual variations from the norm as "immoral" is not so harmless as some affect to believe: such variations appear to be not uncommon among men and women of superlative ability whose powers are needed unimpeded in the service of mankind. To attempt to fit such persons into the narrow moulds which suit the majority is not only an injustice to them as individuals, but it is an offence against society, which may fairly claim that its best members shall not be hampered in its service. The notion that the person whose sexual needs differ from those of the average is necessarily a socially bad person, is a notion unsupported by facts. Every case must be judged on its own merits.

Undoubtedly the most common variation from normal monogamy has in all stages of human culture been polygyny or the sexual union of one man with more than one woman. It has sometimes been socially and legally recognized, and sometimes unrecognized, but in either case it has not failed to occur. Polyandry, or the union of a woman with more than one man, has been comparatively rare and for intelligible reasons: men have most usually been in a better position, economically and legally, to organize a household with themselves as the centre; a woman is, unlike a man, by nature and often by custom unfitted for intercourse for considerable periods at a time; a woman, moreover, has her thoughts and affections more concentrated on her children. Apart from this the biological masculine traditions point to polygyny much more than the feminine traditions point to polyandry. Although it is true that a woman can undergo a much greater amount of sexual intercourse than a man, it also remains true that the phenomena of courtship in nature have made it the duty of the male to be alert in offering his sexual attention to the female, whose part it has been to suspend her choice coyly until she is sure of her preference. Polygynic conditions have also proved advantageous, as they have permitted the most vigorous and successful members of a community to have the largest number of mates and so to transmit their own superior qualities.

"Polygamy," writes Woods Hutchinson (Contemporary Review, Oct., 1904), though he recognizes the advantages of monogamy, "as a racial institution, among animals as among men, has many solid and weighty considerations in its favor, and has resulted in both human and pre-human times, in the production of a very high type of both individual and social development." He points out that it promotes intelligence, coöperation, and division of labor, while the keen competition for women weeds out the weaker and less attractive males.