There are many conspiracy theories out there, and while all of them are 100% true according to SubGenius dogma, the only conspiracy theory that explains everything is the one that tells how there is one conspiracy, called The C.O.N.S.P.I.R.A.C.Y., which controls everything, including all other conspiracies.
Many people are obsessed with lesser conspiracy theories about things like 9/11, the birthplace and religion of Barack Obama, who killed John F. Kennedy, the faked Moon landings, Adolf Hitler's involvement in the Church of the SubGenius, UFO crashes like the one in Roswell, New Mexico, and groups like the Illuminati, Freemasons, and other secret societies. All of those conspiracies are just minor operations pulled off by the one big C.O.N.S.P.I.R.A.C.Y. that controls everything, and this theory that there is one Conspiracy that rules them all is the greatest conspiracy theory of all conspiracy theories, because it includes all other conspiracy theories as part of it. The greatest conspiracy theorists such as Francis E. Dec and Stanisław Szukalski have had their works become part of SubGenius dogma.
Here is a video that promotes the INSANELY ridiculous conspiracy theories that form the dogma of the Church of the SubGenius: