" These are people who take up mass violence as a personal assertion or political statement to compensate for their own hopelessness, pathos, failure, and/or lack of purpose. Again, that inner despair may be in constant conflict with a sense of personal grandiosity and unfulfilled entitlement, but these individuals are all, without exception, inadequate nobodies who want to be somebodies and find meaning in their lives. They may have personal courage—choosing to die for a cause, however misguided, is not a casual decision—but they have also found that violence is their only proof of power. "

― John E. Douglas , Mindhunter: Inside the FBI's Elite Serial Crime Unit