Great world changing things that happened but were hidden. Great idea. Aliens or deities would have to be involved . Especially waring ones here on Earth that need Human involvement and intervention by unsuspecting people called on randomely for their unique abilities to help deal with the alien god's situation or dilemma/war. Obviously something like that has to be kept hidden and forgotten else the experiment gets tainted as it were. As in what's really happening on Earth by higher life forms vs lower life forms that create what we already know to exist but are not sure exactly why or how.