Lots of lovely reading ops here....I have a lot of these books but it's always lovely to see more.
PC was also somewhat ironically and not-so-ironically used in activist Democratic party politics during the 80s and 90s to exclude feminists/POC/anyone who didn't toe the line for the Carter/Clinton heterodoxy, at least that was the case in Oregon. In some circles it was more acceptable to be Republican than a supporter of, say, Jerry Brown, and any uppity woman who didn't play footsie with The Powers That Be got told to go off to the Citizen's Party or Barry Commoner or Ralph Nader (yes, I was told that to my face and this was after many years of working and striving to establish cred and holding local and statewide party offices. I was insufficiently politically pure and a lot of that had to do with being a moderate leftist rather than a right centrist). The only women/queer/people of color allowed in the big tent were those who didn't fight the Democratic Party's move to the right and those of us who were trying to fight that rightward trend were not-so-ironically told we were Politically Correct and to get the hell out.
Which led to the Bush-Gore debacle of 2000, because after a while, you keep pushing people out, then they decide to take their marbles and play elsewhere.
(chuckles bitterly. Things could have been drastically different. But my perspective is an insider view not shared by all.)