I would say they accelerated it..........the real roots lie in the early part of the 20th century with the eugenics movement, of which Margaret Sanger and Adolph Hitler were obvious prominent proponents. Leap forward to the late sixties, and look to radical feminism and the for putting it back on the front burner under the guise of pro-choice. Then there was the 80's and the advent of the very virulent 'political correctness' crowd; I was a teen during this time, and remember their excesses well, an orchestrated effort by leftists and their tyrannical liberal activist judge flunkies to crush any notion of free speech. Which continues to this day.
Ah, the sainted Margaret Sanger. No mention EVER of her real reason for birth control. Her contempt and plans for black population control ignored as if it never existed.