This chapter examines the relationship among three normative questions about American constitutional law: How should the Constitution be interpreted? When may (or should) the Supreme Court overrule its own constitutional precedents? And why is the Constitution binding at all? The author begins by de-constructing the “special difficulty” with stare decisis that proponents of originalist interpretation often perceive. That difficulty, the author contends, can be ex-plained only by reference to some underlying normative theory of constitutional authority―of why the Constitution binds us in the first place. The author then as-sesses four extant accounts of constitutional authority to determine whether any of them implies both originalism and a ...