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Overton window narrows. Small minority moves to Y and cycle repeats. I think this can be extended to more than just "political correctness" - it's a unique affliction of social media that can manifest itself as increasing patriotism (this is happening in China).
I'm pretty sure this all ends in a huge pop. The masses will get sick and tired of not being able to say anything about anything.
Or they get used to the new normal.
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