The problem of the twentieth century is the problem of the color-line -- the relation of the darker to the lighter races of men in Asia and Africa, in America and the islands of the sea. It was a phase of this problem that caused the Civil War.
~ W. E. B. Du Bois - [Race and Racism]
There are certain books in the world which every searcher for truth must know: the Bible, the Critique of Pure Reason, the Origin of Species, and Karl Marx's Capital.
~ W. E. B. Du Bois - [Books: Classics]