you may well prefer a world in which there is a patchwork of places, where in some of them your opinions might get you in serious trouble, but in others you'd be free to discuss them in respectable venues
The trouble with such a setup is that it's the people who are least protected from backlash for doing, speaking or being unapproved things who'd find it the hardest to move to a more ideologically friendly venue. Try telling e.g. a poor black family in 1920s Alabama that they "only" have to move to New York if they want to be treated less like second-class citizens! Oh, wait, wait, you said no race issues. OK, then, one meta-level up: a family of a known but poor egalitarian activist that also mingles a lot with "respectable" minority members - not (exclusively) because it seeks them out to signal its fashionable egalitarianism, but because everyone else truly is hostile to those and they have no-one of an equal economic stratum to turn to. I imagine that the vast majority of their middle-class neighbours would (at least) actively shun and spread gossip about them. At worst, they might get a burning cross in front of their home and such.
The trouble with such a setup is that it's the people who are least protected from backlash for doing, speaking or being unapproved things who'd find it the hardest to move to a more ideologically friendly venue.
You're losing sight of the topic. My remarks were not about the norms imposed on common people, but specifically about the ideological norms imposed on people in intellectual and governmental positions.
I have found this most wonderful (if fairly lengthy) article, and thought you would enjoy having it brought to your attention.
It is so good, I think we should include it among the references in the "Politics is the Mind Killer" wiki page. But, before that, I submit it to you, and ask you: is there anything in this article that would warrant its exclusion from this site? I mean, besides the fact that it is about politics, and written by a notorious Social-democrat (And is that in itself grounds for exclusion?).