Racism, claiming that the content of a man's mind is determined by his ancestors, is a doctrine for brutes. Theories of "bad blood" and "good blood" in relation to morality and intellect, lead to bloodshed in practice. The reason this happens is that men who "regard themselvs as mindless aggregates of chemicals" are only capable of brute force. "Just as there is no such thing as a collective or racial mind, so there is no such thing as a collective or racial achievement."
Racism has only one psychological root: the racist's sense of his own inferiority. It is "a quest for automatic self-esteem, and for automatic knowledge"