Steven Pinker on Why Violence Has Declined

The seemingly endless stream of news about war, crime, and terrorism, might make us believe we live in the most violent age ever seen. But Steven Pinker, Professor of Psychology at Harvard University, explains that just the opposite is true: violence has been diminishing for millennia. In The Better Angels of Our Nature: Why Violence Has Declined he looks at human nature, psychology, and history to explain how this has happened.