Neal Devers, The Overton Bubble:
The trouble with the Overton Window as a mechanism of political control, and with politicization of speech and thought in general, is that it causes significant collateral damage on the ability of your society to think clearly.
If some thoughts are unthinkable and unspeakable, and the truth happens in some case to fall outside of polite consensus, then your ruling elite and their society will run into situations they simply can’t handle….
An unwise political elite is one incapable of thinking clearly about their strategic situation, acting in concert, or sticking to a plan….
An insecure political elite is one which has either no sufficient mechanisms of political power short of the politicization of speech and thought, or is faced by such powerful but somehow never decisively powerful enemies that they need to permanently escalate to a state of vigorous politicization of speech and thought. We can compare this state to “intellectual martial law” for its structural similarity to the physical-security equivalent.