It’s not only deaths in war, but murder, too, that is declining over the long term. Even those tribal peoples extolled by anthropologists as especially “gentle,” like the Semai of Malaysia, the Kung of the Kalahari and the Central Arctic Inuit, turn out to have murder rates that are, relative to population, comparable to those of Detroit. In Europe, your chance of being murdered is now less than one-tenth, and in some countries only one-fiftieth, of what it would have been if you had lived 500 years ago. American rates, too, have fallen steeply over the past two or three centuries. Pinker sees this decline as part of the “civilizing process,” a term he borrows from the sociologist Norbert Elias, who attributes it to the consolidation of the power of the state above feudal loyalties, and to the effect of the spread of commerce. (Consistent with this view, Pinker argues that at least part of the reason for the regional differences in American homicide rates is that people in the South are less likely to accept the state’s monopoly on force. Instead, a tradition of self-help justice and a “culture of honor” sanctions retaliation when one is insulted or mistreated. Statistics bear this out — the higher homicide rate in the South is due to quarrels that turn lethal, not to more killings during armed robberies — and experiments show that even today Southerners respond more strongly to insults than Northerners.)