[bluepistolero]

Actually, in many animal and human populations, the young males are encouraged to become independent and leave the group. This trait of self-independence is highly prized (after all it founded America and lives on in its ideology although the welfare state has neutered it to some extent,) and it is often these rogue males who add their genes to the pool, thus enuring that the domesticated group keep an edge and is able to survive.

bluepistolero

[Junior]

Young males, if they do leave the group, eventually glom onto another group ("No man is an island" is more true than you might think). However, from perusals of anthropological articles, it appears that it is young females that are traded between groups (in ane effort to reduce the possibility of incest) and young males stay within their parent groups. Note, the girls are not ever out on their own, but simply switch groups.