Kotlikoff's paper

Mark Steyn reviews a book, Before the Dawn, that argues that primitive peoples weren't as peaceful as some have led us to believe:

Lawrence Keeley calculates that 87 per cent of primitive societies were at war more than once per year, and some 65 per cent of them were fighting continuously. "Had the same casualty rate been suffered by the population of the twentieth century," writes Wade, "its war deaths would have totaled two billion people." Two billion! In other words, we're the aberration: after 50,000 years of continuous human slaughter, you, me, Bush, Cheney, Blair, Harper, Rummy, Condi, we're the nancy-boy peacenik crowd. "The common impression that primitive peoples, by comparison, were peaceful and their occasional fighting of no serious consequence is incorrect. Warfare between pre-state societies was incessant, merciless, and conducted with the general purpose, often achieved, of annihilating the opponent."