All things related to manipulating the human mind, for better or worse. From psychedelics and memory techniques to top secret government programs like MKULTRA and Project Monarch.
From the Illuminati to the Freemasons, Cult of Mithra to Bohemian Grove, all secret societies tend to share some common features: exclusive perks, networking and promises of greater knowledge.
There's something unique about American culture in particular. Melting pot or Petri dish? As Terrence McKenna once said, "culture is not your friend"
The wonders of modern technology released to the public are decades behind what's possible. Alien technology and skunk works might be the same thing.
More than just astrology and magick, occult is that which is hidden from the profane. Yes to those with eyes who can see, occult knowledge is everywhere.
Various individuals from all time periods and walks of life that pop up in conspiracy theories and occult research frequently.