The Better Angels of Our Nature'Brilliant, mind altering Everyone should read this astonishing book' David Runciman, Guardian Contrary to popular belief, humankind has become progressively less violent, over millenia and decades. Can violence really have declined? The images of conflict we see daily on our screens from around the world suggest this is an almost obscene claim to be making. Extraordinarily, however, Steven Pinker shows violence within and between societies both