Originally Posted by nosreme
I don't worry very much (actually not at all) about what happened or didn't in a couple of almost certainly mythical ancient cities. Social decay can happen and can be forestalled, but I'm pretty certain using parables without any real basis in fact as a "lessons learned" touchstone isn't a way to keep it from happening.
Actually, the cities have been discovered and excavated. There's a pretty convincing video reenactment of an asteroid striking a mountaintop in the Alps
and scattering debris over the region in question.