>>10498210then sure. from the perspective of classical GR, the entire history of the universe pops out as a solution of the Einstein field equation, so it’s basically all set in stone. however GR admits spacetime to have a definite birth and death (in fact the big bang and heat death is the consensus view of cosmology at present) so this doesn’t imply a space time is “eternal”. (however there is the theory of eternal inflation, which is often considered in the context of string theory, which goes beyond GR)
