So is this supposed to be proof of there being other versions of human history in alternate universes?
no. The other universes wouldn’t be like ours necessarily. Could be a completely alien place with different physical laws, etc.
[ So is this supposed to be proof of there being other versions of human history in alternate universes? ]
Maybe if we find a universe where communism was defeated early on we could find a way to travel there and all the libs can stay here and we can go there.