With savages, the weak in body or mind are soon eliminated; and those that survive commonly exhibit a vigorous state of health. We civilised men, on the other hand, do our utmost to check the process of elimination; we build asylums for the imbecile, the maimed, and the sick; we institute poor-laws; and our medical men exert their utmost skill to save the life of every one to the last moment. There is reason to believe that vaccination has preserved thousands, who from a weak constitution would formerly have succumbed to small-pox. Thus the weak members of civilised societies propagate their kind. No one who has attended to the breeding of domestic animals will doubt that this must be highly injurious to the race of man. It is surprising how soon a want of care, or care wrongly directed, leads to the degeneration of a domestic race; but excepting in the case of man himself, hardly any one is so ignorant as to allow his worst animals to breed.
[Darwin,
The Descent of Man (1871 edition), vol. I, p. 168); emphasis added]
He maintained in Descent of Man that human intellectual development was the product of natural selection and that natural selection had produced significant differences in the mental faculties of “men of distinct races.” [See Darwin,
Descent (1871), vol. I, pp.109-110, 160, 201, 216.] In the same book, Darwin disparaged blacks and observed that the break in evolutionary history between apes and humans fell “between the negro or Australian and the gorilla,” indicating that he considered blacks the humans that were the most ape-like. [Darwin,
Descent (1871), vol. I, p. 201] Darwin also predicted that “[a]t some future period, not very distant as measured by centuries, the civilised races of man will almost certainly exterminate and replace throughout the world the savage races.” [Darwin,
Descent (1871), vol. I, p. 201.] The racist cast of Darwin’s thought is difficult to deny.