Jacques elaborates on my observations about the lack of diversity in the social sciences and humanities:
One small comment. You said “left wing thought.” It was true when I began my career in the 70s. I have seen the “thought” part perish in my lifetime. They are now simply a bastion of leftism with almost no thought at all but just tedious repetitiousness. Thought does not normally flourish in the midst of consensus. My friend Dr François Nielsen at U of North Carolina wrote some vigorous things on the subject. (He was trained in the same program as Dr Amburgey and myself.)
I asked Jacques for some sources, and he provided a couple (a pdf here and a short video here). The “same program” Jacques is writing of was Stanford’s sociology department back in the late 60s and early 70s, when Organizational Ecology was prominent (I’ll leave it up to Delacroix and Amburgey to elaborate on the details).
Speaking of diversity, Amburgey disagrees with Delacroix’s (and my) assessment. He thinks the lack of diversity has to do with the rise of STEM. The entire ‘comments’ thread is well worth reading through.