The candidates say it. We say it. Every few years, the world thinks it: “This is the most important election of our lifetime.” And in a nation ripped apart at the seams by two radically different visions for our country, it will never stop being true. Since Barack Obama’s vow to fundamentally transform America — a promise he kept — each November has become less about politics and personalities and more of a ferocious battle over whose worldview will define a nation. Values and traditions that used to unite us have vanished...