n 1543, Nicolaus Copernicus published a new theory stating the earth revolves around the sun. This is known as the Copernican theory. This theory was considered a serious challenge to the Ptolemaic theory and the Roman Catholic Church. Copernicus died before he could prove his theory.
At the time the Ptolemaic theory was adopted, there was another guy who had it right. Ptolemy was politically connected, so he won the argument. That was the start of being PC or Politically Correct.
The Politically Correct version was not changed until Galileo. That's 1500 years or so.
Doesn't hold much hope that the present PC crowd is going away soon.