Mass murders seem to happen every week now - from school shootings to bombings to people driving their cars into busy crowds. Why do they happen? Are violent video games to blame? Gun laws? The lack of affordable and accessible mental health care? In this book, we will examine each of the most well-known and most interesting mass murders in American history - including: -The Las Vegas shooting -The Aurora movie theater shooting -The Columbine High School shooting -The 9/11 Hijackings -The Barnum & Bailey Circus Tent Fire -The Bisbee Cowboy Hangings -The Starkweather Homicides -The Manson Family Murders -And more! We will also examine what can be done to stop mass murders in the future - from changing guns laws to improving mental healthcare.