> I sometimes imagine, with horror, what would happen if after 500 years of progress, humanity were to realize that almost all cultural practices they painfully, one by one, undid, were all sensible to begin with for reasons that humanity didn't previously understand.

Especially since modern cultural change seems to have a tendency to be driven by the youngest politically-aware cohorts. Not a lot of time to acquire wisdom that might prevent that, if you're so young you haven't even collected enough knowledge yet.