Cults rule the world. Unsuccessful cults are terrorist groups. Successful cults are religions and governments.
Wikipedia for Dr. Robert J. Lifton
Wikipedia for Dr. Margaret Singer
Dr. Robert J. Lifton on Destructive Cults - "3/17/00 - One of the leading experts in mind control, Dr. Lifton addressed the issue of doomsday cults such as Aum Shinrikyo":
Dr. Margaret Singer - Recovery From Mind Control (November 1991):