To anyone interested in more of this issue, which is super relevant today. I'd recommend checking out James Lindsay and Helen Pluckrose. James runs a website newdiscourses.com and Helen runs Areo Magazine online. Both have read quite a bit on the subject and layout the post modern, marxists and neo-Marxist roots. Many criticize Peterson for his shallow take on the subject. Really he is right, but he isnt very precise or definitive on the subject.