On the other hand, Dr. Prichard believes it may be asserted, without the least chance of valid contradiction, that mankind, of all races and varieties, are equally capable of having offspring by intermarriage, and that such connections are equally prolific whether contracted between individuals of the same variety or of the most dissimilar varieties. “If there is any difference,” he says, “it is probably in favour of the latter.”[1661] According to M. Godron, the mongrels have generally shown a higher degree of fertility than their parent races;[1662] and M. Quatrefages asserts that mulattoes are as fruitful as pure breeds.[1663]
It is to be regretted that so little attention has for some time been paid to this most important question. The result is that the effects of the intermixture of races are not much better known now, than they were twenty or thirty years ago. The only thing which may be considered certain is, that the hypothesis of the depressing influence of crossing upon fertility, as the theory has generally been propounded, involves a great deal of exaggeration. It is chiefly owing to M. Broca’s celebrated essay, ‘Sur l’hybridité,’ that this doctrine has been so widely accepted. He asserts that the connections of Europeans with Australian women have proved very slightly prolific, and that the mongrels resulting from them are almost sterile. “No statistical writer,” he says, “nor any historian, enumerates cross-breeds among the Australian population.”[1664] Yet, this land has for a considerable time been inhabited by European colonists, many of whom have not had opportunities of marrying wives of their own race. It has also been shown that the cohabitation of whites and native women is very common in Australia. But the number of mongrels there is, nevertheless, exceedingly small, so small that in the native dialects there does not exist a single word to designate them.[1665]
Supposing that these remarkable statements referred chiefly to the eastern and southern parts of the Australian continent, I asked Bishop R. Salvado and the Rev. Joseph Johnston, living in West Australia, to inform me whether, in that country, any mixed race exists, and, if so, whether it is fruitful or not. From the former, who has lived among the West Australian aborigines for more than forty years, and through an excellent work on their life and customs has gained the reputation of a first-rate authority, I had the pleasure of receiving the following answer, dated New Norcia, October 17, 1888:—“With regard to the sterility of the half-caste natives, of which I had no experience when I wrote my book, I am able now to deny it altogether, except in cases similar to those among the Europeans. I know several cases of husband and wife, half-caste natives, having at present six and seven and even eight children, and they may in time have more; and I know a good many Europeans who, having married native women, have several children. In fact, in the case of one of those marriages there were six children, and in another seven, and I could give the name of each of them.” The Rev. J. Johnston writes, “There is a school for half-caste boys and girls at Perth, and they seem bright and intelligent children, not unlike Polynesian children. As they grow up, they go out to service, and some of the youths are employed as post and telegraph messengers.... At the New Norcia mission, there are several half-caste families, as well as blacks, and they all have children.” The following statement of Mr. Taplin referring to the aborigines of the Lower Murray, goes in the same direction:—“The pure blacks,” he says, “are not so healthy as the half-castes. Always the children of two half-castes will be healthier and stronger than either the children of blacks or the children of a black and a half-caste. When a half-caste man and woman marry, they generally have a large and vigorous family. I could point to half a dozen such.”[1666]
These statements of highly competent persons are, I think, quite sufficient to disprove M. Broca’s hypothesis. They show that, if a mixed race is almost wanting in certain parts of Australia, this does not depend upon physiological conditions of the kind suggested. It should be remembered that the sexual intercourse of Europeans with savage women is most commonly transitory and accidental, and frequently takes place with prostitutes or licentious women, who are generally known to be sterile. And, even when the white settler takes a native’s daughter to live with him under his own roof as a wife or a concubine, and accustoms her to a half-civilized manner of living, her unfruitfulness[1667] may be owing to quite another cause than the mixture of blood. Mr. Darwin has shown that changed conditions of life have an especial power of acting injuriously on the reproductive system. Thus animals, as also plants, when removed from their natural conditions, are often rendered in some degree infertile or completely barren, even when the conditions have not been greatly changed. And this failure of animals to breed under confinement cannot, at least to any considerable extent, depend upon a failure in their sexual instincts. “Numerous cases,” says Mr. Darwin, “have been given of various animals which couple freely under confinement, but never conceive; or, if they conceive and produce young, these are fewer in number than is natural to the species.”[1668] It is reasonable to suppose that savage man, when he moves into more civilized conditions, is subject to the same law. Indeed, statements have been reported to me, which tend to show that the indigenous women at the Polynesian missionary stations have become less fruitful than they were in their native state. As to the alleged sterility of crosses between the European and Australian races, it should be observed that the rarity of mongrels in certain parts of Australia is more or less owing to the natives themselves habitually destroying the half-castes.[1669] The Rev. A. Meyer states that, in the Encounter Bay tribe, “nearly all the children of European fathers used to be put to death;”[1670] whilst, among the Narrinyeri, about one-half of the half-caste infants fell victims to the jealousy of their mothers’ husbands.[1671] But with regard to the West Australian aborigines in the neighbourhood of Fremantle, the Rev. J. Johnston writes that he does not think it has been the custom there to destroy the half-caste illegitimate offspring of black women, as he never heard of such a thing,—a fact which may account for the comparatively large number of mongrels in that part of the continent.
Other statements also, adduced as evidence for the hypothesis of M. Broca, have proved more or less untrustworthy. Thus the alleged sterility of the mulattoes of Jamaica[1672] has been disputed by other writers.[1673] So also v. Görtz’s statement that the children of the Dutch and Malay women in Java (Lipplapps) are only productive to the third generation,[1674] has been called in question.[1675]
Yet, although we may consider it certain that the diversities even between the races which least resemble each other are not so great but that, under favourable conditions, a mixed race may easily be produced, I do not deny the possibility of crossing being, to a certain extent, unfavourable to fertility. The statements as to the rapid increase of some mixed races do not prove the reverse. For the bad result of crossing would not necessarily appear at once; and a drop of pure blood would be sufficient to increase fertility, just as, when a hybrid is crossed with either pure parent species, sterility is usually much lessened.[1676] It is a remarkable fact that mixed marriages between Jews and persons of other races are comparatively infertile. In Prussia, these marriages have been separately registered since 1875, and between that year and 1881 there was an average of 1·63 to a marriage, whereas, during the same period, pure Jewish marriages resulted in an average of 4·41 children or very nearly three times as many. In Bavaria, between 1876 and 1880, the numbers were only 1·1 per marriage against 4·7 children to purely Jewish marriages. And this conspicuous infertility implies greater sterility. Among fifty-six such marriages, with regard to which Mr. Jacobs ascertained the results, no fewer than nine were sterile, i.e., 18 per cent.,—a striking contrast to the number of sterile marriages which he found in seventy-one marriages between Jewish cousins, where the percentage of sterility was only 5·4 per cent.[1677] Mr. Jacobs, however, informs me that it has been suggested that this infertility may be due rather to the higher age at which such marriages are likely to take place. There is still a strong feeling against them among Jews, which is only likely to be overcome after independence of thought and position has been reached. At the same time Mr. Jacobs does not consider this sufficient to account for the very great discrepancy. But we must not, of course, take for granted that the crossing of any two races has the same effects as the crossing of Jewish and non-Jewish Europeans seems to have.
Even if it could be proved, however, that mixture of races produces lessened fertility of first crosses and of mongrels, this would not make it necessary for us to reject the doctrine of the unity of mankind. It is true that the domesticated varieties both of animals and of plants, when crossed, are as a general rule prolific, in some cases even more so than the purely bred parent varieties; whereas species, when crossed, and their hybrid offspring, are almost invariably in some degree sterile. But this rule is not altogether without exceptions. Even Agassiz condemned the employment of fertility of union as a limiting principle. He considered this a fallacy, “or at least a petitio principii, not admissible in a philosophical discussion of what truly constitutes the characteristics of species.”[1678] Thus the red and yellow varieties of maize are in some degree infertile when crossed, and the blue-and the red-flowered forms of the pimpernel, considered by most botanists to be the same species, as they present no differences of form or structure, are, according to Gärtner, mutually sterile. Moreover, Mr. Darwin’s investigations on dimorphic and trimorphic plants have shown that the physiological test of lessened fertility, both in first crosses and in hybrids, is no safe criterion of specific distinction.[1679] As for animals, Professor Vogt asserts that, in the opinion of experienced breeders, certain races can with difficulty be made to pair, and the fertility of the mongrels soon diminishes, whilst other races pair readily and are prolific.[1680] Sir J. Sebright says, “Although I believe the occasional intermixture of different families to be necessary, I do not, by any means, approve of mixing two distinct breeds, with the view of uniting the valuable properties of both: this experiment has been frequently tried by others as well as by myself, but has, I believe, never succeeded. The first cross frequently produces a tolerable animal, but it is a breed that cannot be continued.”[1681]
[CHAPTER XIV]
PROHIBITION OF MARRIAGE BETWEEN KINDRED
The horror of incest is an almost universal characteristic of mankind, the cases which seem to indicate a perfect absence of this feeling being so exceedingly rare that they must be regarded merely as anomalous aberrations from a general rule.