Knowledge and societal changes are just an extension of evolution. Obviously the results of a large expansion are somewhere in the range of population 0 to a bit less than now.
Which makes me wonder if civilization lives long enough by any chance till the end of universe, The Big Crunch and all that, would the prevailing knowledge be of interest to another universe of it's just an abstract visualization that exists along with universe and it's history and is bound to die along with it?