I've always thought that.
I.E
Either we came across some advanced as shit(the cabal, or good guys) then got into bed with said advanced shit.
They require energy, we get trade off. WE got some advanced shit. (Cabal doesn't want to share)
takes control.
They offer kids and what not to sacrifice per the deal. Evil shit.
IDK, just spit balling here.
OR, their are some ancient beings or whatever that demand these things..underground?