I just happened across an article titled "The Sociology of the Ayn Rand Cult" that was written in 1972 by the libertarian economist Murray Rothbard. (Ayn Rand was the author of the novels The Fountainhead and Atlas Shrugged.) As I read the article, I noted so many similarities with JWs, particularly as regards practices of thought and behavior control (including disfellowshipping, shunning, dividing families, banning forbidden books, discouraging free discussion, claims to being the one source of truth, and so forth). While the Watchtower org supplies supposed spiritual justifications for such practices, it's interesting that an organization of committed atheists would develop and employ similar control techniques.
The article is at http://www.lewrockwell.com/rothbard/rothbard23.html.