Political correctness is a rapidly spreading and virulent disease that infects every human institution, including science fiction and, as it turns out, comedy on the university campus. It is of course a progressivist movement, a phenomenon exclusively of the Left. Caitlin Flanagan in The Atlantic boils down into one paragraph a lot of what I have been writing about lately:
O, Utopia. Why must your sweet governance always turn so quickly from the Edenic to the Stalinist? The college revolutions of the 1960s--the ones that gave rise to the social-justice warriors of today's campuses--were fueled by free speech. But once you've won a culture war, free speech is a nuisance, and "eliminating" language becomes a necessity.
She herself indulges in a little PC in her article, but when you get a chance, you should read:
Original text copyright 2015 Terence E. Hanley