Just like tech goes through cycles and everything old is new again (Corba to XML to JSON to gRPC), maybe morals are too on a cycle. In tech the typical time constant is for the young gen to burn and churn. In morals it is a few generations (as grandparents influence it)

Maybe the cycle will bring back social shame again, which to me is at a historical low. And we'll again have manners manuals with content copied from 1924. Politeness, saying please and thank you, waiting for adults to finish before interrupting, doing house chores, no shouting, etc.