“Of the origin of the Negro race or other human races, we know nothing . But we do know that human beings inhabited Africa during the Pleistocene period, which may have been a half million years ago.”
P. 86, THE WORLD AND AFRICA by W. E. B. DuBois (1946, 1987)https://en.wikipedia.org/wiki/Pleistocene?fbclid=IwAR3ddvsbkeWKbQXW5TL8DyuqL-pwcnDru1_oQSYz1XgDaI0hPrk4688QhHQ