Read Jared Diamond's Guns, Germs, and Steel when he describes New Guinea where there is an absence of a set of social rules and an enforcing authority. There is constant, destructive feuding, and a disproportionate amount of energy goes into members of the society bumping other members off over women, possessions, etc. As it stands in this society, nothing is going to get any better and there is a high probability that things are going to get worse. Internecine problems are very destructive. Unferth is a kin killer.
Intrafamily conflict is taboo.
Destructive lone wolves such as the Grendels are particularly bad. They are unguided missiles, out of control berserkers. They live beyond habitation and the firelight. Warrior who can't bond with anyone are dangerous. Battle is good, but you can't have in incessantly and in your own camp.