One of Charles Darwin's more famous works, discussing sexual selection and evolutionary biology.

"Authorized edition."

Part IThe descent or origin of man -- The evidence of the descent of man from some lower form -- On the manner of development of man from some lower form -- Comparison of the mental powers of man and the lower animals -- Comparison of the mental powers of man and the lower animals-continued -- On the development of the intellectual and moral faculties during primeval and civilised times -- On the affinities and genealogy of man -- On the races of man -- Part II Sexual selection -- Principles of sexual selection -- Secondary sexual characters in the lower classes of the animal kingdom -- Secondary sexual characters of insects -- Insects, continued-order Lepidoptera (butterflies and moths) -- Secondary sexual characters of fishes, amphibians, and reptiles -- Secondary sexual characters of birds -- Birds-continued -- Birds-continued -- Birds-concluded -- Secondary sexual characters of mammals -- Secondary sexual characters of mammals-continued -- Part III Sexual selection in relation to man, and conclusion -- Secondary sexual characters of man -- Secondary sexual characters of man-continued -- General summary and conclusion.