NATIONAL BESTSELLERA New York Times Ten Best Books of the YearFinalist for the Lionel Gelber PrizeThoughtful and brilliant insights into the very nature of war--from the ancient Greeks to modern times--from world-renowned historian Margaret MacMillan.War, the instinct to fight, is inherent in human nature; peace is the aberration in history. War has shaped humanity, its institutions, its states, its values and ideas. Our very language, our public spaces, our private mem