"No such absolute type ever existed on either side. Both were slowly differentiated from a common ancestry and continually remingled their blood while the differentiating was progressing. From prehistoric times down to to-day Africa is, in this sense, primarily the land of the mulatto. So, too, was earlier Europe and Asia; only in these countries the mulatto was early bleached by the climate, while in Africa he was darkened."
Du Bois, W. E. B., 1915, The Negro (p. 8). Kindle Edition.
