I think the conditio sine qua non of whatever social movement PG is trying to describe here is that we have become, and will become more, a low-trust culture. Social circles are wider and shallower now than ever. If I can't take the time to get to know a person, I can't assume good faith when they use some questionable word. It benefits me to impute the worst motive, because (1) it is much safer to avoid a false harm…
> these sub-societies will dwindle until there's nothing left of them, and all that's left is The Culture
This would be a terrible result. Google 'urban monoculture' A pluralistic society is more resilient to catastrophes, and preserving all these small, dwindling cultures is as important if not more as preserving species that are endangered.