Ken Burns has set himself the impossible task of retelling a national origin story that all Americans will embrace as their own. He began work on the resulting six-part, twelve-hour series, The American Revolution, nearly a decade ago, just as the so-called Great Awokening got going. The years 2015-2025 have been energizing and inspiring for culture warriors and historical polemicists. But Burns is neither. His craft consists in conveying, intelligently, artfully and respectfully, the mainstream historical consensus. And that consensus has become so politicized it no longer meaningfully exists. Burns’s earnest effort to reconjure it merely results in incoherence. The...