The bettering angels of our nature

Steven Pinker's The Better Angels of Our Nature: Why Violence Has Declined sets out to prove and explain a simple factual premise: that violence of all kinds has decreased dramatically over the course of human history. From that one premise, momentous conclusions follow logically. Ridiculous as it may seem to start commenting on Pinker's case after reading no more than the preface, I can't resist: the terms in which he sets his task themselves have important political implications.