These Truths, by Jill Lepore
From the publisher: “These Truths tells this uniquely American story, beginning in 1492, asking whether the course of events over more than five centuries has proven the nation’s truths, or belied them. To answer that question, Lepore traces the intertwined histories of American politics, law, journalism, and technology, from the colonial town meeting to the nineteenth-century party machine, from talk radio to twenty-first-century Internet polls, from Magna Carta to the Patriot Act, from the printing press to Facebook News.”