The Descent Of Man

Excerpt-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.