War ends at the moment when peace permanently wins out. Not when the articles of surrender are signed or the last shot is fired, but when the last shout of a sidewalk battle fades, when the next generation starts to wonder whether the whole thing ever really happened. World War II ended as war always ends -- by trailing off into nothingness and doubt. Its final monument has never been seen by mortal eyes. It's a phantom image at the edge of a rumor: an unmarked grave in the depths of the South American jungle where a weird and decrepit old man, half forgotten by the world, at last entered the lists of oblivion.

Hersey was describing for the first time the war's true legacy: a permanent condition of helpless anger and universal dread. Hiroshima was the end of the line for the archaic idea that war was something that soldiers did on battlefields, somewhere on the far side of the horizon. The great strategic breakthrough of the war had been the targeting of civilian populations with weapons of mass destruction -- so that for the first time in history everybody, soldier and civilian alike, could share equally in the horror of battle. Now the postwar world was elevating this principle, making it the organizing fact of existence. After Hiroshima, Armageddon could erupt anytime, anywhere on earth, without warning, by accident. Even as people walked heedlessly in the streets, the bombs could be spiraling down from an invisible plane passing in the stratosphere; at dinnertime in the heartland, as the local news droned on about the Middle East, the missiles could already be arching over the north pole, like the ribs of a strange new cathedral.