Ideas really don’t come along that often. Already in 1840, Alexis de Tocqueville observed that in America, “ideas are a sort of mental dust,” that float about us but seldom cohere or hold our attention. For ideas to take hold, they need to be comprehensive and organizing; they need to order people’s experience of themselves and of their world. In 20th-century America, there were only a few ideas: the Progressivism of Wilson; Roosevelt’s New Deal; the Containment Doctrine of Truman; Johnson’s War on Poverty; Reagan’s audacious claim that the Cold War could be won; and finally, the post-1989 order rooted in “globalization” and “identity politics,” which seems to be unraveling before our eyes.

Yes, Donald Trump is implicated in that unraveling, cavalierly undermining decades worth of social and political certainties with his rapid-fire Twitter account and persona that only the borough of Queens can produce. But so is Bernie Sanders. And so is Brexit. And so are the growing rumblings in Europe, which are all the more dangerous because there is no exit strategy if the European Union proves unsustainable. It is not so much that there are no new ideas for us to consider in 2016; it is more that the old ones are being taken apart without a clear understanding of what comes next. 2016 is the year of mental dust, where notions that stand apart from the post-1989 order don’t fully cohere. The 2016 election will be the first—but not last—test of whether they can.

If you listen closely to Trump, you’ll hear a direct repudiation of the system of globalization and identity politics that has defined the world order since the Cold War. There are, in fact, six specific ideas that he has either blurted out or thinly buried in his rhetoric: (1) borders matter; (2) immigration policy matters; (3) national interests, not so-called universal interests, matter; (4) entrepreneurship matters; (5) decentralization matters; (6) PC speech—without which identity politics is inconceivable—must be repudiated.

lots more: http://www.politico.com/magazine/story/2016/09/donald-trump-ideas-2016-214244