The Future of American Civil Religion by Daniel Strand.
Whatever you think of American civil religion, Protestantism was the fuel that made it go. When you lose the fuel, you lose the benefits that have accrued to American society because of it. And the benefits were substantial, even as we are now appreciating the costs, too. One of the most significant and underappreciated benefits was the unity it generated. It provided a shared set of morals and duties that had broad tacit support and adherence. Cicero often wrote about the civic “bonds” (vinculum) that held Rome together, and for America our civic glue was Protestantism. Tocqueville, insightful as ever, described the Protestant consensus this way: “all differ in respect to the worship which is due to the Creator; but they all agree in respect to the duties which are due from man to man.”