Book excerpt: This follow-up volume to Dr. Stone's The Anatomy of Evil presents compelling evidence that, since a cultural tipping-point in the 1960s, certain types of violent crime have emerged that in earlier decades never or very rarely occurred. The authors examine the biological and psychiatric factors behind serial killing, serial rape, torture, mass and spree murders, and other severe forms of violence. In addition, they persuasively argue that, in at least some cases, a collapse of moral faculties contributes to the commission of such heinous crimes, such that "evil" should be considered not only a valid area of inquiry, but sometimes an imperative one. Returning to his groundbreaking scale for the ranking of degrees of evil, Dr. Stone and Dr. Brucato, a fellow violence and serious psychopathology expert, provide more detail than ever before, using dozens of cases associated with the twenty-two categories along the continuum. They also consider the effects of new technologies, as well as sociological, cultural, and historical factors since the 1960s that may have set the stage for new forms of violence. Further, they explain how personality, psychosis, and other qualities can meaningfully contribute to particular crimes, making for many different motives. Relying on their extensive clinical experience, and examination of writings and artwork by infamous serial killers, these experts offer many insights into the logic that drives horrible criminal behavior, and they discuss the hope that in the future such violence may be prevented.