Reva Siegel\u27s lecture, ‘Constitutional Culture, Social Movement Conflict and Constitutional Change: The Case of the de Facto ERA,’ explores the interaction between the courts and social movements in creating constitutional meaning. In the primary part of this response I focus my comments on Siegel\u27s three major contributions: First, the historical explanation of the source of the Court\u27s authority in the development of the so-called de facto ERA; second, the articulation of a general, jurisprudential thesis regarding social contestation as a source of constitutional authority apart from text, history, and principle; and third, the quasi-sociological descriptive account of the form social contest must take to be juris generative. I ...