If you saw the movie American Sniper, then you remember the difference between a "sheep, a wolf, and a sheepdog." This terminology was coined by Lt Col Dave Grossman in his book, On Killing and his subsequent work, On Combat. This was a fascinating conversation about the psychological affect of violence and how it is threatening the safety of our society. Col Grossman now teaches Sheepdog Seminars all over the country, training churches, schools, and other organizations on how to protect themselves from increasingly violent world.