BOOK RECOMENDATION: On Killing: The Psychological Cost of Learning to Kill - By Lt. Col. Dave Grossman

On Killing: The Psychological Cost of Learning to Kill. What makes soldiers kill--or not--animates this intriguing survey by a psychologist and former U.S. Army officer. Col. Grossman reveals that only a fraction of soldiers kill during warfare (and feel revulsion when they do); the rest (about 85 percent in World War II) resist by missing the target or refusing to fire.