failure of many of these individuals to contribute progeny, probably this does not happen, so far as males are concerned, as much as might be supposed, for such individuals are often innately defective in their instincts or, in the case of disappointed lovers, have a badly proportioned emotional equipment, since it leads them into a position so obviously opposed to race interests.
But, to pass to the essential comparison, that between the sexually immoral and the sexually moral as limited above, it is necessary first of all to decide whether monogamy is a desirable and presumably permanent feature of human society.
We conclude that it is:
- Because it is spreading at the expense of polygamy even where not favored by legal interference. The change is most evident in China.
- In monogamy, sexual selection puts a premium on valuable traits of character, rather than on mere personal beauty or ability to acquire