by Patrick Appel
Steven Pinker argues that violence is declining:
In the decade of Darfur and Iraq, that statement might seem hallucinatory or even obscene. But if we consider the evidence, we find that the decline of violence is a fractal phenomenon: We can see the decline over millennia, centuries, decades, and years. When the archeologist Lawrence Keeley examined casualty rates among contemporary hunter-gathererswhich is the best picture we have of how people might have lived 10,000 years agohe discovered that the likelihood that a man would die at the hands of another man ranged from a high of 60 percent in one tribe to 15 percent at the most peaceable end. In contrast, the chance that a European or American man would be killed by another man was less than one percent during the 20th century, a period of time that includes both world wars. If the death rate of tribal warfare had prevailed in the 20th century, there would have been two billion deaths rather than 100 million, horrible as that is.
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