Contrary to popular belief, we now live in the least violent times in human history. The Better Angels of our Nature is about the forces that helped us be less violent. Listen to Ola, Tom Erik and Qalbi talk about some of them on this episode of Bookcasting.
Pinker devotes larger parts of the book to convincing you that violence has in fact declined. Still, we find his book most helpful when he discusses the so-called "Angels of our Nature", the four forces that contribute to our peace. These are empathy, self-control, moral sense and reason.