Marx’s discussions of law have long made jurists anxious. His relegation of law, along with art and philosophy, to the realm of ideology [1], his reference to law as a “mirror” [2], his insistence that “legal relations arise from economic ones” [3]—taken together, these claims not only threaten to unsettle flattering narratives that put lawyers on the side of social progress, but suggest what some would take to be worse: that our work is, in historical terms, irrelevant.