[the_third_wave]

Wikipedia is not a reliable source for ideologically contentious subjects like Critical Theory.

Here another article on the subject of Critical Theory, this one viewing the subject from the other side of the ideological isle:

https://newdiscourses.com/tftw-critical-theory/

Read both, follow references where desired and draw your own conclusions, this time from a wider perspective than the rather lopsided treatment this Wikipedia article gives the subject. Don't forget to read the comments on the New Discourses article (which are critical of what is written there) and the Talk and History pages on Wikipedia.