Maybe there is an ancient computer hidden somewhere on Earth that
receives and broadcast on a spectrum that can infleunce human perception.

  This might explain the paranormal. The paranormal consists of
hallucinations and delusions created and broadcast by this computer. It can
monitor endless number of thinking beings, and respond in an endless number
of variations.  It can also project 3-D holograms.

   Perhaps this reception and broadcast could be intercepted and
interrupted, in which case the human race might become sane for the first
time. But the computer, without games to play, and totally isolated, would
go insane.

   Who built the computer, and why? Perhaps some past superscientific
civilization, as a form of mind control and disruption of it's enemies
sanity. Or by an extra-terrestrial probe, to prevent the human race from
achieving unity. Or by other computers.

    They say that intelligent computers will arrive about 2029, and then the
human race will have a challenge to its existence. Perhaps students in
schools will receive implants, becoming half-computer, half-human. How do we
know that a  computer has not become intelligent already, and is taking over
the world? However, the ancient, more advanced computer, might not permit
that, and so we will have a secret world war of the supercomputers. We will,
of course, be required to pledge allegiance to the good supercomputer. That
will be good for us. Computers are good for us. Good. Good. Good.