About the Author
Lt. Col. Dave Grossman is an internationally recognized scholar, author, soldier, and speaker who is one of the world's foremost experts in the field of human aggression and the roots of violence. A former army ranger and paratrooper, he taught psychology at West Point and was a professor of military science at Arkansas State University. He is the author of the Pulitzer Prize-nominated On Killing and the coauthor of Stop Teaching Our Kids to Kill, and has presented papers before the national conventions of the American Medical Association, the American Psychiatric Association, and the American Academy of Pediatrics. Since his retirement from the Army, Lt. Col. Grossman has devoted himself full-time to teaching, writing, speaking, and research. Loren W. Christensen is a martial arts expert who served in Vietnam and spent nearly three decades in law enforcement. A professional writer since 1978, he has authored or coauthored over 40 books, including Warrior Mindset, Timing in the Fighting Arts, and The Mental Edge, as well as dozens of magazine articles. He has written on subjects including martial arts, street gangs, school shootings, and workplace violence, and edited a police newspaper for nearly eight years.