Jared Diamond in The New Yorker:
State government is now so nearly universal around the globe that we forget how recent an innovation it is; the first states are thought to have arisen only about fifty-five hundred years ago, in the Fertile Crescent. Before there were states, Daniel’s method of resolving major disputes—either violently or by payment of compensation—was the worldwide norm. Papua New Guinea is not the only place where those traditional methods of dispute resolution still coexist uneasily with the methods of state government. For example, Daniel’s methods might seem quite familiar to members of urban gangs in America, and also to Somalis, Afghans, Kenyans, and peoples of other countries where tribal ties remain strong and state control weak. As I eventually came to realize, Daniel’s thirst for vengeance and his hostility to rival clans are really not so far from our own habits of mind as we might like to think.