> More people in their life they can rely on Even in this super-rare case where one father lives with multiple wives, the attention/resources of the father is

> More people in their life they can rely on Even in this super-rare case where one father lives with multiple wives, the attention/resources of the father is still divided among even more children. Also, the wives usually view the other children as competitors. The dynamics of this setup are known from old harems/courts.