The “chains of PC” were created by communists as part of a long-term strategy to overthrow the West. The root cause of this isn’t PC. PC is just the main tool in their arsenal to destroy Western Civilization and to disguise it as “fairness” and “equality.”
Today, there isn’t a Central Committee in the Soviet Union controlling groups all over the world. Instead we have thousands of splinter and offshoot leftist groups worldwide coordinating without any strong central control, but, acting in concert, this confederation is wiping out the West more effectively than the Soviet nuclear arsenal ever did.
It works because these independent actors outlasted the Soviets. The same Marxists the Central Committee ordered infiltrate Academia are still there. They will die of course, but they have raised a new generation of Commies, and they will educate and raise yet another, etc. The seeds of the Soviet Union, doing as they were supposed to.