If you look at today's headlines, you might well think that the world has never been a more dangerous place. Next time on KPR Presents, how violence has actually declined in modern times. Dr. Steven Pinker is the author of The Better Angels of Our Nature: Why Violence Has Declined. Pinker spoke at the Linda Hall Library in Kansas City, Missouri, where he argues that, contrary to popular belief, we may be living in the most peaceful era yet.