Lt. Col. Dave Grossman (retired) is the author of a dozen books including best seller 'On Killing' and 'On Combat', dealing with the psychological effects of killing and war on soldiers. Grossman was a Professor of Psychology at West Point, a former infantryman, paratrooper, and graduate of the Army's Ranger School. Grossman stands alongside men such as Massad Ayoob, Jeff Cooper, and John Farnham, as a person who has begun conversations and helped laid the groundwork that the modern science of lethal force encounters rests on. In this video, Grossman talks about the phallic nature of neckties, and speaks to controversies surrounding his writings, as well as sometimes controversial issues such as women in combat and in policing. Grossman refers to Sigmund Freud, Friedrich Nietzsche, and the Bible as he unpacks his beliefs.