The idea of the feud is that someone in a rock on hand altercation, gets hurt or killed. And we can't give a normative statement to that, because it causes some ills and great things too. The first example i can think of that comes to mind of the resolution to the feud is the mark cane, after cane kills abel in the bible.
Stuntman and action designer Eric Jacobus joins EconTalk host Russ Roberts for a no-holds-barred discussion of the biological basis for violence and how to avoid the worst of it, the value of violence as spectator sport, and the vast superiority of duels to feuds--Alexander Hamilton notwithstanding.