If you are one of the great many who subscribes to the view that nature is red in tooth and claw, that humans are fundamentally and biologically selfish and only culture constrains our selfish impulses, please read this book. After you have done that, send a copy to your local politician! By golly they certainly need huge doses of the author's wisdom and insight.
In many of the developed nations the last 30 years has been marked by a distinct cultural shift towards a more Ayn Rand type view of human behavior. I have no idea why anyone would trust a philosopher to instruct them about human behavior, it is like asking a child to create quantum mechanics.
Frans De Waal, in the great tradition of Darwin and all good science, seeks to enlighten us as to the origins of our behavior by referencing not theories and intuitions, but observations tempered by a rigorous empiricism. The Age of Empathy is an outstanding piece of work.