However, Darwin did have some racist views about evolution. He said this in Chapter 5 of his fictional science tome:
EXTINCTION CAUSED BY NATURAL SELECTION.
This subject will be more fully discussed in our chapter on Geology; but it must here be alluded to from being intimately connected with natural selection. Natural selection acts solely through the preservation of variations in some way advantageous, which consequently endure. Owing to the high geometrical rate of increase of all organic beings, each area is already fully stocked with inhabitants, and it follows from this, that as the favoured forms increase in number, so, generally, will the less favoured decrease and become rare. Rarity, as geology tells us, is the precursor to extinction. We can see that any form which is represented by few individuals will run a good chance of utter extinction, during great fluctuations in the nature or the seasons, or from a temporary increase in the number of its enemies. But we may go further than this; for as new forms are produced, unless we admit that specific forms can go on indefinitely increasing in number, many old forms must become extinct. That the number of specific forms has not indefinitely increased, geology plainly tells us; and we shall presently attempt to show why it is that the number of species throughout the world has not become immeasurably great.
Darwin wrote another book later (Descent of Man) in which he expanded on his views. Here are notes from that 2nd book:
Although best known for On the Origin of Species, Darwin does not address human evolution and race until his 1871 book, The Descent of Man, in which Darwin applies his theories of natural selection to humans and introduces the idea of sexual selection. Here his white supremacism is revealed. Over the course of the book, Darwin describes Australians, Mongolians, Africans, Indians, South Americans, Polynesians, and even Eskimos as “savages:” It becomes clear that he considers every population that is not white and European to be savage. The word savage is disdainful, and Darwin constantly elevates white Europeans above the savages. Darwin explains that the “highest races and the lowest savages” differ in “moral disposition … and in intellect” (36). The idea that white people are more intelligent and moral persists throughout. At one point, Darwin says that savages have “low morality,” “insufficient powers of reasoning,” and “weak power of self-command” (97). Darwin’s specific consideration of intellectual capacities is especially alarming. He begins with animals: “No one supposes that one of the lower animals reflects whence he comes or whither he goes,—what is death or what is life, and so forth” (62). His remarks soon expand to humans. “How little can the hard-worked wife of a degraded Australian savage, who uses hardly any abstract words and cannot count above four, exert her self-consciousness, or reflect on the nature of her own existence” (62). Darwin writes that Australians are incapable of complex thought, and insinuates that they are akin to lower animals: His perspective on non-European races is incredibly prejudiced and absurd. Modern evolutionary scholars and teachers tend to ignore or omit that component of Darwin’s theory, but it hasn’t gone completely unnoticed. For example, Rutledge Dennis examined Darwin’s role in scientific racism for The Journal of Negro Education and found that in Darwin’s world view, “talent and virtue were features to be identified solely with Europeans” (243). White supremacy is clearly embedded in The Descent of Man, regardless of Darwin’s brilliance or the accuracy of the rest of his theory.
Darwin makes a disturbing link between his belief in white supremacy and his theory of natural selection. He justifies violent imperialism. “From the remotest times successful tribes have supplanted other tribes. … At the present day civilised nations are everywhere supplanting barbarous nations” (160). Darwin’s theory applies survival of the fittest to human races, suggesting that extermination of non-white races is a natural consequence of white Europeans being a superior and more successful race. Further, Darwin justifies violently overtaking other cultures because it has happened regularly throughout natural history. The arc of Darwin’s evolutionary universe evidently does not bend toward justice: He has no problem with continuing the vicious behavior of past generations. Claims such as those made evident in the title of a 2004 book, “From Darwin to Hitler,” may not be as alarmist as they seem.