It's a holographic universe we live in, those privy to that knowledge use it as leverage over others. I was told once that the "program" we "live" in was created to observe potentials and outcome of what were were back then (now as far as our perspective)
This is all created by what we become in the future. Like the wars of our past where knowledge was the real enemy (and still is to the Powers Over Others or the POO) in the future, much of their past is unknown to them.
Just like ours.
So much of the earlier parts of this project were erased when the muzzies burned the library of Alexandra. The same ignorant masses now want to destroy the "pagan" pyramids.
This will continue throughout human history until finally, what we become a few million years, recreates a facsimile of the past to try and guess how things actually played out. Not much different than than the SIMS are we, at least according to what I was told.