I personally think a lot of this is spurious. Although I am inclined to agree that post-modernism went too far (almost from day one), and was mostly bullshit.
The fact is that social power is distributed according to a mathematical power law. However you name these socio-political perspectives, they are not part of a process of evolution. Those that came later may have more insights, or be better at sophisticated use (and abuse) of language and rhetoric. But it’s mostly just elites competing.