It feels to me like it laid out some of the issues for the reasons why the "poorly educated" of the western world seem to be making their voices heard more at the ballot box these days. And also why the established media can't seem to get a grasp on it. It's not saying anything you don't know but it sums it up quite succinctly.
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It's harder still to understand that there are millions of people in America whose ambitions for a life of steadily improving conditions cratered sometime around nine years ago and have never recovered. If you can hardly imagine that you could follow the Horatio Alger script to the letter and still find yourself sinking in quicksand, you're never going to understand why someone would be so contemptuous of the pieties of a system that only pays attention to you when doing soft-focus interviews in search of a journalism award or a campaign ad.