While it isn't a conspiracy per se, I think animism and the idea of all things having a spirit is true to some extent. Animals are the ones with the most observable cases, but plant life may also have spirits, like the Dryads, but we just can't observe their phenomenon of their spirits at work because it's outside our senses. Then there's also rocks, rivers, and locations, which have all been described in ancient times as having their own spirits, or rather have had spirits inhabiting them. If you want to go further, the ancient Gnostics described the planets as having spirits, as the Archons. While I don't agree that these planetary spirits are necesarily evil (except Saturn, perhaps), I do think even the planets and the Sun have spirits, whose affects and positions have effects on us.