This is kind of a longish video but I think what he means when he talks about the demise of the political left what he is really talking about is the demise of one world government style globalism. On one hand you have the demise of Neocon internationalism of the Bushes and on the other is the demise of the Globalist international order of Biden, Pelosi, Schumer and the like. In place of that you will have the civic nationalism of Trump, DeSantis , and Rand Paul and on the other the racial and ethnic tribalism of AOC, Ilhan Omar and the Squad. That will be the political landscape of the future. the corrupt Oligarchs running the country today are being squeezed from both sides and will not hold up.