The genius of liberalism in unleashing human freedom and the human mind changed us more in centuries than we had changed in hundreds of millennia. And at its core, there is the model of the single, interchangeable, equal citizen, using reason to deliberate the common good with fellow citizens. No ultimate authority; just inquiry and provisional truth. No final answer: an endless conversation. No single power, but many in competition.
In this open-ended conversation, all can participate, conservatives and liberals, and will have successes and failures in their turn. What matters, both conservatives and liberals agree, is not the end result, but the liberal democratic, open-ended means. That shift — from specifying a single end to insisting only on playing by the rules — is the key origin of modern freedom.
My central problem with critical theory is that it takes precise aim at these very core principles and rejects them. By rejecting them, in the otherwise noble cause of helping the marginalized, it is a very seductive and potent threat to liberal civilization.