Using research data, including first-person accounts from the perpetrators themselves, a special investigator and psychologist and a sociologist, who built The Violence Project, a comprehensive database of mass shooters, share their solutions for putting an end to these tragedies that have defined the modern era.

Years after the shocking murders that made the name Charles Manson synonymous with pure evil, the three women killed for him, Leslie Van Houten, Patricia Krenwinkel, and Susan Atkins, remain under the spell of the infamous cult leader. Confined to an isolated cellblock in a California penitentiary, the trio seems destined to live out the rest of their lives under the delusion that their crimes were part of a cosmic plan until empathetic graduate student...