What, in your mind, was 20th century politics defined by?

Edit: like I get the economism here feels reductive to you, I think, but I just think it would at least be equally absurd to say they were predominantly defined by identity issues. As is shown in the essay, our concept of identity is intractable from globalism and modernity. So I'm just not sure what the obvious issue is here. If we admit that it is nuanced, then you have to explain where the lines of that nuance are obvious, and economism is a good tool for that.