On Killing: The Psychological Cost of Learning to Kill in War and Society

The revised and updated edition of Lt. Col. Dave Grossman's modern classic about the psychology of combat.

"An illuminating account of how soldiers learn to kill and how they live with the experiences of having killed." -Washington Post

The twentieth century, with its bloody world wars, revolutions, and genocides accounting for hundreds of millions dead, would seem to prove that human beings are incredibly vicious predators and that killing is as natural as eating. But Lieutenant Colonel Dav...