Ivanhoe Chaput explains that there are reasons and purposes why fighting is part of the human experience. There may not be anyone in history that has not had at least a verbal confrontation with another, while others have engaged in much more serious physical fighting.The earliest act of violence recorded in the Bible was when Cain killed Abel. Cain became jealous because God liked Abel's offering better, and this made him angry enough to kill his brother. In an odd parallel in 2009, a boy killed his brother for watching a different television show from the one he wanted to watch. His claim was that he had an uncontrollable urge to kill someone and was inspired by the television serial killer Dexter. An answer to why some people are more prone to violence and those influenced by watching violence is revealed.There are hockey fans that attend the sport because the fights enhance the experience. The popularity of the Ultimate Fighting Championship in the octagon rose so dramatically that it broke the industry's all-time pay-per-view record of $222,766,000 back in 2007. Ivanhoe's personal experience is that watching fighting can lead to wanting to watch more of it, thus, implanting data into the subconscious.Learn why certain chemical processes in the brain promote the fighting experience with rewards, and why revenge is referred to as "sweet." From the structures of the brain to genetic personality traits to more esoteric eye-opening reasons, this book exposes why immersing one into confrontational experiences and violence-oriented activities can simply lead to more of it.Why People Fight is an enlightening read that Chaput says changed his views on what had once annoyed him to the point of anger. It's pointed him toward an understanding of the spark that can erupt into a firestorm.