Hedrick Smith’s book “Who Stole the American Dream” is a good resource to understand the reach and impact of The Powell Memorandum, beyond its frontal assault on academia. It created modern conservatism, and here we are today on the precipice, living with the consequences of what it put into motion 53 years ago.

https://en.wikipedia.org/wiki/Lewis_F._Powell_Jr.#Powell_Memorandum,_1971