Evolutionary psychologist Steven Pinker claims the answer is a resounding “yes” in his forthcoming book, The Better Angels of Our Nature: The Decline of Violence in History and Its Causes. The British newspaper The Guardian just published a feature article on the book. Here’s a snippet: Drawing on the work of the archaeologist Lawrence Keeley, Pinker recently concluded that the chance of our ancient hunter-gatherer ancestors meeting a bloody end was somewhere between 15% and 60%. In the 20th century, which included two world wars and the mass killers Stalin and Hitler, the likelihood of a European or American dying a violent death was less than 1%. Pinker shows that, with notable exceptions, the long-term trend for murder and violence has been going down…