“Political correctness is a war on noticing.”

Paris Review (1995), as cited in The Oxford Treasury of Sayings and Quotations (2011), ed. Susan Ratcliffe, Oxford University Press, p. 250 : ISBN 0199609128
Other

Speech at the Harvard Law School (1999), as quoted in "Appreciation : Charlton Heston" in TIME magazine (6 April 2008) http://www.time.com/time/arts/article/0,8599,1728272,00.html

An Audience With Billy - 1985

2010s, 2016, June, Speech about the Orlando Shooting (June 13, 2016)

"The Curse Of Cultural Marxism" (7 July 2018) https://www.youtube.com/watch?v=trAyp5XXQgo#t=5m25s
2018

(zh-CN) “战争是政治的继续”，在这点上说，战争就是政治，战争本身就是政治性质的行动，从古以来没有不带政治性的战争。
1930s, On Protracted Warfare (1938)

2010s, 2016, July, (21 July 2016)

Usenet signatures

Playboy interview (1996)
Context: I foresaw political correctness 43 years ago. … whereas back then I wrote about the tyranny of the majority, today I'd combine that with the tyranny of the minorities. These days, you have to be careful of both. They both want to control you. … I say to both bunches, Whether you're a majority or minority, bug off! To hell with anybody who wants to tell me what to write. Their society breaks down into subsections of minorities who then, in effect, burn books by banning them. All this political correctness that's rampant on campuses is B. S. You can't fool around with the dangerous notion of telling a university what to teach and what not to.