Today, there are thousands of cults around the world. Broadly speaking, a cult is a group or movement with a shared commitment to a usually extreme ideology that’s typically embodied in a charismatic leader.
http://ed.ted.com/lessons/why-do-people-join-cults-janja-lalich
https://www.ted.com/talks/ex_moonie_diane_benscoter_how_cults_think
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