The Descent of Man Volume 1 Chapter VII - On the Races of Man Part 2

In which the nature of human races and species is examined with careful consideration of their bodily and mental resemblances, alongside reflections on the gradual divergence and possible convergence of early human progenitors. The narrative then turns to the melancholic decline and extinction of various tribes under changing conditions, attributing their diminution chiefly to diminished fertility and altered habits amidst contact with civilisation.