Lieutenant Colonel Dave Grossman is a retired US Army Ranger and paratrooper, and a former West Point Psychology Professor. He is also the director of the Killology Research Group and actually developed the term “killology,” considered the study of the psychological and physiological effects of killing and combat on the human psyche.Dave is an accomplished author who has published four novels, two children’s’ books, and six non-fiction books, which include his perennial bestseller On Killing.Since his retirement from the US Army in 1998, he has been on the road almost 300 days a year for two decades as one of our nation’s leading trainers for military, law enforcement, mental health providers, and school safety organizations.In this episode of Bulletproof Radio, we talk about developing a “bulletproof mind,” the effect that violent visual entertainment has on children, as well as ways to bulletproof your marriage and your kids.