The Descent of Man and Selection in Relation to Sex, Vol. I
CHAPTER VII.
ON THE RACES OF MAN.
The nature and value of specific characters--Application to the races of man--Arguments in favour of, and opposed to, ranking the so-called races of man as distinct species--Sub-species-- Monogenists and polygenists--Convergence of character--Numerous points of resemblance in body and mind between the most distinct races of man--The state of man when he first spread over the earth--Each race not descended from a single pair--The extinction of races--The formation of races-- The effects of crossing--Slight influence of the direct action of the conditions of life--Slight or no influence of natural selection--Sexual selection. 214-250