Renowned moral philosopher Jonathan Glover confronts the brutal history of the twentieth century to unravel the mystery of why so many atrocities occurred. In a new preface, Glover brings the book through the post-September 11 era and into our own time--and asks whether humankind can "weaken the grip war has on us.""Praise for the first edition: ""It is hard to imagine a more important book. Glover makes an overwhelming case for the need to understand our own inhumanity, and reduce or eliminate the ways in which it can express itself--and he then begins the task himself. "Humanity "is""an extraordinary achievement."--Peter Singer, Princeton University"This is an extraordinary book: brilliant, haunting and uniquely important. Almost 40 years ago a president read a best seller and avoided a holocaust. I like to think that some of the leaders and followers of tomorrow will read "Humanity."""--"Steven Pinker, "New York Times Book Review"