The cargo cults of the South Pacific developed because the locals couldn't get their heads wrapped around the fact that there are societies out there that are far more sophisticated than their own to the point that they can produce airplanes and umbrellas and canned food.

America's Joe Shmoes developed moon landing conspiracy theories because they couldn't get their head wrapped around the fact that there are fellow countrymen and communities that are far more sophisticated than their are to the point they can just travel to other celestial bodies.