That sexual selection has actually resulted in modification of human physical structure, Darwin thinks can be shown by reference to the ancient Persians, whose type was greatly improved by intermarriage with the beautiful Georgian and Circassian women. He refers to several similar cases, and particularly to the Jollofs of West Africa, whose handsome appearance is said to be due to their retaining for wives only their most beautiful slaves, the others being sold.

Sexual selection may be operative for the improvement of the race through the action of either man or woman, and the conditions of its activity are different in either case. As to the action of man, Darwin says in relation to primitive peoples: "The strongest and most vigorous men—those who could best defend and hunt for their families, who were provided with the best weapons and possessed the most property, such as a large number of dogs or other animals—would succeed in rearing a greater average number of offspring than the weaker and poorer members of the same tribe. There can, also, be no doubt that such men would generally be able to select the more attractive women. At present, the chiefs of nearly every tribe throughout the world succeed in obtaining more than one wife."

With reference to selection by the women, Darwin shows that among savages they have much more to say in their marriages than is usually supposed. He remarks: "They can tempt the men they prefer, and can sometimes reject those whom they dislike, either before or after their marriage. Preference on the part of the women, steadily acting in any one direction, would ultimately affect the character of the tribe, for the women would generally choose, not merely the handsomest men, according to their standard of taste, but those who were at the same time best able to defend and support them. Such well-endowed pairs would commonly rear a larger number of offspring than the less favored." Darwin adds: "The same result would obviously follow in a still more marked manner if there were selection on both sides, that is, if the more attractive, and at the same time more powerful men were to prefer, and were preferred by, the more attractive women. And this double form of selection seems actually to have occurred, especially during the earlier periods of our long history."

The investigations of Darwin as to the operation of sexual selection had reference chiefly to the modification of physical characters. He did not altogether lose sight, however, of its possible influence in affecting for the better the mental characteristics of the race. He concludes his enquiry by the remark that "Man might by selection do something, not only for the bodily constitution and frame of his offspring, but for their intellectual and moral qualities. Both sexes ought to refrain from marriage if they are in any marked degree inferior in body or mind; but such hopes are Utopian, and will never be even partially realized until the laws of inheritance are thoroughly known. Every one does good service who aids towards this end."

It is in the application of the principle of sexual selection to the mental characteristics of man, that any real improvement of the race, viewed as consisting of human beings and not of mere animals, must be brought about. Beauty of physical form and feature is of importance in human relations only so far as it is associated with beauty of mind and character, that is, with high intellectual and moral attainments. That these often go together is true, but it is not always the case. Grant Allen says: "To be sound in wind and limb; to be healthy of body and mind; to be educated; to be emancipated; to be free, to be beautiful—these things are ends towards which all should strive, and by attaining which all are happier in themselves, and more useful to others." But physical and intellectual perfection are not always found together, as was observed by Darwin, when he mentioned among the causes which interfere with the physical action of sexual selection the fact that men are largely attracted by the mental charms of women. Professor Jowett affirms truly that "Many of the noblest specimens of the human race have been among the weakest physically. Tyrtæns or Æsop, or our own Newton, would have been destroyed at Sparta, and some of the fairest and strongest men and women have been among the wickedest and worst." Hence, he properly infers that "Not by the Platonic device of uniting the strong and the fair with the strong and the fair, regardless of sentiment and morality, nor yet by his other device of combining dissimilar natures, have mankind gradually passed from the brutality and licentiousness of primitive marriage to marriage Christian and civilized."

The truth of this inference cannot be denied, because to leave out of view considerations of sentiment and morality would fatally vitiate any scheme for the improvement of the human race. But Professor Jowett affirms that, "We do not know how by artificial means any improvement in the breed can be effected." The problem is no doubt a complex one. As he points out, a child has usually thirty progenitors only four steps back, and whatever truth there may be in the inheritance of special physical characters, "We have a difficulty in distinguishing what is a true inheritance of genius or other qualities, and what is mere imitation or the result of similar circumstances. Great men and great women have rarely had great fathers and mothers." Professor Jowett thinks, indeed, that too much importance may be ascribed to heredity. He says: "The doctrine of heredity may seem to take out of our hands the conduct of our lives, but it is the idea, not the fact, which is really terrible to us. For what we have received from our ancestors is only a fraction of what we are or may become. The knowledge that drunkenness or insanity has been prevalent in a family may be the best safeguard against their recurrence in a future generation. The parent will be most awake to the vices or diseases in his child of which he is most sensible within himself. The whole of life may be directed to their prevention or cure. The traces of corruption may become fainter, or be wholly effaced; the inherited tendency to vice and crime may be eradicated. And so heredity, from being a curse, may become a blessing. We acknowledge that in the matter of our birth, as in our nature generally, there are previous circumstances which affect us. But on this platform of circumstances, or within this wall of necessity, we have still the power of creating a life for availment by the reforming energy of the human will."

There is much truth in these remarks of Professor Jowett, but they do not affect the argument in favor of the possibility of bringing about an improvement in the race if the proper means are adopted. It would not be any wiser for the strong and healthy to marry with the sick and weak, because the latter happen to be highly intellectual or moral, than to marry with the strong and healthy if these physical characters are united with mental weakness or immorality. There is a consensus of opinion at the present day, that what should be aimed at is the union of physical perfection with that of intellect and character, in the persuasion that steps towards this end will ultimately lead to the general improvement of the human race.

Difficulties in the Way.—The difficulty is to devise and carry out some scheme for the purpose which shall be both feasible and agreeable to public sentiment. The latter consideration would prevent any attempt at active stirpiculture under State direction, although the State might indirectly affect the result by subsidiary regulations as to marriage and training of children. There is nothing, however, to prevent the systematic efforts of private individuals, and in such cases the causes which Darwin cites as interfering with the physical action of sexual selection would not operate. The most systematic experiment in stirpiculture of modern times was that originated by John Humphrey Noyes at the Oneida Community, in central New York, from 1868 to 1879. A paper on this experiment was read by Anita Newcomb McGee before the American Science Association in August, 1891, which was published in "The American Anthropologist," 1891, and the following facts are taken from that paper.

An Experiment in Stirpiculture.—Noyes was the founder of a religious sect, the members of which, owing to their desire for freedom from sin, were called Perfectionists. Holiness was the first principle of their creed, and Noyes thought to transmit that condition from one generation to another by a process of stirpiculture. To overcome the "selfishness" of monogamic marriage he devised a "system of regulated promiscuity, beginning at earliest puberty, and by a method of his own invention he separated the amative from the propagative functions." Its first principle was that of a judicious in and in breeding, with occasional mingling of foreign blood, as in stock-raising. The second principle adopted was that of "careful selection of individuals for breeding purposes. Genealogies were studied and medical histories compiled." A committee, headed by Noyes, selected the holiest members who were free from physical defects, intellectual and other considerations being given less weight at first, although in later years they received more consideration. The parents were of all ages, but the father was always older than the mother. Some sympathy between the persons mated was always required; and if a proposition for union came from two individuals it was allowed if no objections were found. Noyes held that uncle and niece are as much related as father and daughter, because brothers have identical blood, and that cousins are in the same relation to each other as half brothers. In the Oneida Community uncles and nieces twice paired, and it is noticeable that a considerable proportion of the children had Noyes' blood on one or both sides. The founder himself had nine children in the Community, to which belonged also his brother, his two sisters and their children. As to the care of the children, this belonged exclusively to the mothers for the first nine months, after which for a further nine months they took charge of their offspring at night only. When eighteen months old, the children were transferred to a separate department which was managed by those who had shown themselves specially fitted for the work.

Let us see what was the result of Noyes' experiment. Of the sixty[39:A] children born, five died at or near childbirth from unforeseen causes depending upon the mother. All the others were alive at the date of Mrs. McGee's communication, except a boy who was reared in spite of weakness, and died from a trifling malady when about sixteen years of age. All the children were strong and healthy, the boys being tall—several over six feet—broad-shouldered and finely proportioned; the girls robust and well-built. It is remarkable, that among the children between five and nine years of age, thirteen were boys and six only were girls. With reference to their intellectual ability, it is stated by Mrs. McGee that, of the oldest sixteen boys, ten were in business, chiefly employed as clerks, foremen, etc., in the manufactories of the joint stock company. The eleventh was a musician of repute; another a medical student; one passed through college and studied law; one was a college senior, and one entered college after winning State and local scholarships, and gave great mathematical promise. The sixteenth boy was a mechanic, and the only one employed in manual labor. Of the six girls between eighteen and twenty-two years, three are said by Mrs. McGee to be especially intellectual. The mothers of these children usually belonged to the classes employed in manual labor, while the fathers, with the exception of the Noyes family and half a dozen lawyers, doctors and clergymen, were all farmers and mechanics. It is noteworthy that, as a rule, the fathers were the intellectual superiors of their mates, "and enquiry develops the fact, known in the Community, that in these cases the children are markedly superior to the maternal stock."