A growing number of constitutional scholars are urging the nation to rethink its commitment to judicial supremacy. Popular constitutionalists argue that the American people, not the courts, hold the ultimate authority to interpret the Constitution\u27s many open-ended provisions whose meanings are reasonably contestable. This Article defends popular constitutionalism on two important fronts. First, using originalism as a paradigmatic example of the ways in which courts frequently draw constitutional meaning from sources deeply rooted in the past, the Article contends that defenders of judicial supremacy still have not persuasively responded to the familiar dead-hand query: Why should constitutional meanings that prevailed in the past be pri...