It may be interesting to study regimes, cults, sects, etc., of the past and present as an aid to predict the future of this one.
Here's a link to purchasing info about a historical book on the Iglesia ni Cristo:
The history of Mormonism might contain interesting parallels.
Communist regimes like the Soviet Union I think contain very relevant parallels.
Then of course there's the Worldwide Church of God. I thought I read somewhere that the WTS had people investigate that one, perhaps to see where things went wrong? I don't know if that's hearsay.