Brooks argues for Burkean restraint in undoing the radicalism of the last 80 (gasp!) years. Isn’t that how all lib victories are won?
That does sum up a certain dichotomy we see in the modern world. However, I don't think Brooks recognizes the Ratchet Effect as described by Margaret Thatcher -- when the Left has power, they always move society to the Left. When the Right has power, they endeavor to hold the current position -- there is never any reverasal. The result is a slow and inexorable movement toward the Left over time.
Brooks actually seems to argue that, in the spirit of the British Enlightenment, we should hold on to tried and true ideas, we should build on the structure that has been bequeathed to us -- that is: Woodrow Wilson's Progressivism, FDR's New Deal, LBJ's Great Society, etc. Those wonderful old ideas from the past ought to be maintained.
I say Fie upon it. We went down the wrong road in the 20th century, and we need to Reason this out, sweep away the last 100 years of political and social reform and start building anew. Build upon a Christian worldview and upon the principles set down by the Founding Fathers. If that flies in the face of Brook's view of the British Enlightenment, so be it.