It depends on the country your asking about. In the USA, political correctness didnt really become a major problem until the 1980s and 90's. In the UK it started in the 1980s.
Campaign Against Political Correctness was created in 2004.
'I think political correctness has gone too far.'
Political correctness
Murphy Brown - 1988 Political Correctness 6-4 was released on: USA: 11 October 1993
Dennis Miller Live - 1994 Political Correctness 2-2 was released on: USA: 28 October 1994
Its called Political Correctness. Which of-course its total nonsense in it self.
Political Correctness at the expense of actualcorrectness.
I doubt you'll get an accurate answer in these times of political correctness.
A PC pony is one that has competed at Pony Club events - nothing to do with political correctness!!
overconfidence
people without the ability to defend an idea, so they prefer to silence anyone who disagrees