When we hear of an atrocity such as a mass murder in a mall, or a theater, or of someone's murderous rampage against children in a school it affects us all. We recoil in shock, disbelief, horror, and with many questions. What exactly happened? How did it happen? How was it allowed to happen? And most importantly what can be done to stop it from happening again? This book examines a number of significant mass murder incidents through history both in this country and in other countries. It presents the facts on how much violence we do experience as a culture and how this has changed over time. It explores the professional thinking about the mental health issues, motivations, and the personality traits of those who perpetrate mass murder. It acknowledges the complexities of trying to address those mental health issues. Also discussed is the role of the media in the public's perception of these tragedies and of firearms. It discusses some of the effects that the media and entertainment can have on the perpetrators themselves. The book presents and evaluates some of the efforts that have been made around the world to address the problem of gun violence. Included is a discussion of the rate of gun ownership in 169 different countries including the USA and how this correlates with incidents of gun homicide. Most importantly this book discusses things that can be done to address the risk of murderous violence. This is, after all, what we all want when we address this subject. Incidents of mass shootings are rare but there are warning signs that we can detect that will if acted upon, lesson the risk .This is Stephen Challis's second book dealing with the subject of gun rights. His first Debarred the use of Arms is available on Kindle and Amazon .com as well as other on line booksellers.