W. E. B. Du Bois,
The Conservation of Races
“ What is the real meaning of Race; what has, in the past, been the law of race development, and what lessons has the past history of race development to teach the rising Negro people? [Pg 6] When we thus come to inquire into the essential difference of races we find it hard to come at once to any definite conclusion. Many criteria of race differences have in the past been proposed, as color, hair, cranial measurements and language. And manifestly, in each of these respects, human beings differ widely. ”
