This essay advances a formalist conception of constitutional stare decisis. The author argues that instrumentalist accounts of precedent are inherently unsatisfying and that the Supreme Court should abandon adherence to the doctrine that it is free to overrule its own prior decisions. These moves are embedded in a larger theoretical framework--a revival of formalist ideas in legal theory that he calls neoformalism to distinguish his view from the so-called formalism caricatured by the legal realists (and from some other views that are called formalist ). In Part II, The Critique of Unenumerated Constitutional Rights, the author sets the stage by briefly recalling why the unenumerated rights precedents are under theoretical (and politic...