Newsnight: Why Is Violent Crime Decreasing? (VIDEO)

24/04/2014 04:23 BST | Updated 24/04/2014 04:59 BST

Why is the rate of violent crime decreasing? Professor Steven Pinker, author of The Better Angels of Our Nature, led a fascinating discussion on Newsnight on Wednesday, arguing that the role of government and policing has had a positive impact on the crime rate since the Sixties.