The political corollary to this is that all politics devolves into bitter conflict between extremes, every election a winner-take-all cliffhanger between competing elites with divergent worldviews (each side willing to use every tool to gain an upper hand, from lawfare to astroturfed activism that veers into violence). It's going to be populist marxism vs. nationalist populism, Lula vs. Bolsonaro (or Newsom vs. Vance), forever. There is no center.