In December, a group of the French protesters known as gilets jaunes were stopping motorists at a traffic circle where the N151 meets the D951A, next to a forested hill in Burgundy. The gilets, so called for their distinctive yellow traffic-emergency vests, had banded together a month before to rally against a tax on diesel. Over several weeks, though, their grievance had grown less political (about this or that policy) and more existential (about the impossibility of making ends meet in France’s boondocks).