And men and women to this day marry more with their eyes than with their heads.
The coloration of man, however, though it may have come to subserve the purposes of mating, does not seem in its origin to have been like the bright coloration of the male bird.

It was not something wholly useless save as a means of sexual attraction, though in such a capacity useful because a mark of vital vigour.

Colour almost certainly developed in strict relation to climate.

Right away in the back ages we must place what Bagehot has called the race-making epoch, when the chief bodily differences, including differences of colour, arose amongst men.

In those days, we may suppose, natural selection acted largely on the body, because mind had not yet become the prime condition of survival.