Faced with the ceaseless stream of news about war, crime, and terrorism, one could easily think we live in the most violent age ever seen. Yet as New York Times bestselling author Steven Pinker shows in this startling and engaging new work, just the opposite is true: violence has been diminishing for millennia and we may be living in the most peaceful time in our species' existence. For most of history, war, slavery, infanticide, child abuse, assassinations,...

"Unlike World War I, when the horrors of battle were largely confined to the front, World War II reached into the lives of ordinary people in an unprecedented way. Entire countries were occupied, millions were mobilized for the war effort, and in the end, the vast majority of the war's dead were non-combatant men, women, and children. Inhabitants of German-occupied Europe--the war's deadliest killing ground--experienced forced labor, deportation,...