Charles Brown: Notice Dubois is playing on the word "Problem". In those days white intellectuals tended to discuss Negroes as a "Problem." The Colorline ( from Frederick Douglass's essay, _The Colorline_), was considered more an American than European problem by Dubois and Douglass. . However in the 21st Century in Europe, white supremacist politics are on the rise due to People of Color from ex-colonial nations "coming home to roost", so to speak.