Lt. Col. Dave Grossman

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 and violent crime.

Col. Grossman is a former West Point psychology professor, professor of military science, and an army ranger who has combined his experiences to become the founder of a new field of scientific endeavor, which has been termed “killology.” In this new field, Col. Grossman has made revolutionary new contributions to our understanding of killing in war, the psychological costs of war, the root causes of the current "virus" of violent crime that is raging around the world, and the process of healing the victims of violence, in war and peace.

Lt. Col. David Grossman is the author or co-author of five non-fiction and four fiction books. He has co-authored a New York Times bestselling book with Glenn Beck. His book "On Killing" has sold over a half million copies worldwide, has been translated into five languages, is on the US Marine Corps Commandant’s Required Reading List, and is required reading at the FBI academy and numerous other academies and colleges. Col. Grossman co-authored "Stop Teaching Our Kids to Kill: A Call to Action Against TV, Movie and Video Game Violence," which has received international acclaim. Col. Grossman’s next book was "On Combat," which was also placed on the US Marine Corps Commandant’s Required Reading List. His book "Warrior Mindset" applies sports psychology and performance psychology to military and law enforcement.

Col. Grossman has written 23 book chapters and 35 book forwards. He has been called upon to write the entry on “Aggression and Violence” in the Oxford Companion to American Military History and three entries in the Academic Press Encyclopedia of Violence. He has also authored or co-authored 43 articles in journals and periodicals, including the Harvard Journal of Law & Public Policy and Pediatric Annals. Additionally, He has presented papers before the national conventions of the American Medical Association, the American Psychiatric Association, the American Psychological Association, and the American Academy of Pediatrics.

He has presented to over 100 different colleges and universities worldwide, and he has trained educators and law enforcement professionals, at the federal, state, and regional levels, in all 50 states and over a dozen foreign nations. He helped train mental health professionals after the Jonesboro school massacre, and he was also involved in counseling or court cases in the aftermath of the Paducah, Springfield, Littleton, Virginia Tech, and Nickel Mines, PA Amish school massacre. In February 2018, after the Parkland, FL school massacre, Col. Grossman was called to the White House to serve on President Trump’s Round Table on Violent Video Games.

Col. Grossman is an Airborne Ranger infantry officer and a prior-service sergeant and paratrooper, with a total of over 23 years of experience in leading U.S. soldiers worldwide. He retired from the Army in February 1998 and has devoted himself full-time to teaching, writing, speaking, and research.