Du Bois held that Marx’s analysis required modification for the American race problem

Evidence

It was a great loss to American Negroes that the great mind of Marx and his extraordinary insight into industrial conditions could not have been brought to bear at first hand upon the history of the American Negro between 1876 and the World War. Whatever he said and did concerning the uplift of the working class must, therefore, be modified so far as Negroes are concerned by the fact that he had not studied at first hand their peculiar race problem here in America. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 1118