The cult that Jim Jones started lasted over 20 years.
it ended in Jonestown like this.
His followers never figured out that he was a con man. 
Gene Griessman is an internationally known keynote speaker, actor, and communication strategist. His book “TheWords Lincoln Lived By” is in its 23rd printing and “Time Tactics of Very Successful People” is in its 43rd printing. His training video “Lincoln on Communication” is owned by thousands of corporations, libraries, and government organizations. He has spoken at conventions and annual meetings all over the world. To learn more about his presentations, call 404-435-2225. Learn more at Atlanta Speakers Bureau or at his website. His latest book “Lincoln and Obama” has just been released by Audible.