@nprofile1q... and as I go down the rabbit hole on this, this span of time includes two glacial maximum periods where sea levels would have been 380’ lower, much of the far north would have seemed like Antarctica, and humans lived among megafauna.
What I learned in school about the linear development of civilization has now been disproven in a few key areas that push dates back a long way, but maybe more importantly is the record of total civilization collapse that has happened a lot of times.