Constitutional interpretation cannot escape the gravitational pull of the past. Every serious theory of constitutional meaning must reckon with how historical practice, longstanding custom, and inherited understanding bear upon the resolution of present disputes. Yet the appeal to tradition, however intuitive, conceals methodological puzzles of formidable complexity.

The invocation of tradition performs distinct evidentiary and normative functions in constitutional argument. Sometimes it serves as evidence of original meaning, sometimes as a proxy for popular consent, and sometimes as an autonomous source of constitutional value. These functions overlap and occasionally conflict, producing doctrinal confusion that scholars have only partially disentangled.

This essay develops a theoretical account of constitutional tradition that resists both the fossilization favored by certain originalists and the dismissive posture of unmoored progressivism. Tradition, properly understood, is neither a frozen inheritance nor a mere rhetorical ornament. It is a living practice—dynamic, contested, and productive—through which constitutional communities work out the enduring meaning of their fundamental commitments. The question is not whether to consult tradition, but how to interpret it with the analytical rigor that constitutional adjudication demands.

Constitutional interpreters deploy tradition in several analytically distinct modes, and clarity about these modes is prerequisite to any coherent doctrinal use. In its most modest form, tradition functions as evidentiary—historical practice illuminates the original public meaning of constitutional language by showing how contemporaries understood and applied that language in concrete cases.

A second mode treats tradition as constitutive: longstanding practice does not merely evidence pre-existing meaning but partially constitutes constitutional meaning itself. Under this view, sustained governmental practice acquiesced in by the political branches and the public generates constitutional norms through a kind of prescriptive settlement analogous to customary international law.

A third mode, more philosophically ambitious, invokes tradition as a source of substantive value—the accumulated wisdom of generations serves as evidence of what deserves constitutional protection. This is the register in which Justice Harlan famously spoke of "the balance which our Nation, built upon postulates of respect for the liberty of the individual, has struck between that liberty and the demands of organized society."

Each mode carries distinct theoretical baggage. The evidentiary mode presupposes fixed original meaning; the constitutive mode presupposes mechanisms of legitimate constitutional change outside Article V; the substantive mode presupposes epistemic humility about individual reason and reliance on collective judgment sedimented over time.

Failure to distinguish these modes produces category errors that plague contemporary doctrine. When the Court invokes tradition without specifying its function, it obscures the theoretical commitments that alone can justify the argumentative move—and invites the suspicion that tradition serves as post-hoc rationalization for conclusions reached on other grounds.

Takeaway

Tradition is not one argument but several. Constitutional reasoning demands specifying whether history evidences meaning, constitutes it, or embodies substantive wisdom—because each function rests on different theoretical foundations.

No question in tradition-based interpretation is more consequential, or more susceptible to manipulation, than the level of generality at which the relevant tradition is described. The choice determines outcomes before analysis begins, converting apparently descriptive claims into concealed normative judgments.

Consider the classic example. Is the relevant tradition one of "marriage between one man and one woman," or of "the freedom to marry the partner of one's choice," or of "intimate association within recognized familial structures"? Each characterization is historically defensible; each yields a different constitutional result. The methodological question is whether any principled criterion governs the choice.

Justice Scalia's proposed rule—select the most specific level at which a relevant tradition can be identified—has the virtue of constraining judicial discretion but the vice of arbitrary specificity. Nothing in the concept of tradition itself dictates that particular resolutions rather than underlying principles constitute the operative inheritance.

The alternative approach, associated with the second Justice Harlan and elaborated by Ronald Dworkin, asks which characterization best coheres with the broader structure of constitutional principle. This method rejects the fantasy of theory-neutral description and openly acknowledges that generality choices reflect substantive judgments about what makes tradition worth honoring.

The honest position recognizes that no algorithm can eliminate discretion at the generality-selection stage. What theory can demand is transparency: interpreters should articulate why the chosen level of abstraction best captures the moral point of the practice being invoked, subjecting that judgment to the same critical scrutiny applied to substantive constitutional argument.

Takeaway

The level of generality problem is not a technical wrinkle but the central theoretical fault line. Every tradition-based argument smuggles in a normative premise about which features of history matter and why.

The deepest theoretical error in tradition-based interpretation is treating tradition as a static deposit rather than an ongoing practice. Living traditions, as Alasdair MacIntyre observed, are historically extended arguments about the goods that constitute the tradition itself. Constitutional traditions share this dynamic character.

American constitutional practice illustrates the point. The tradition of religious liberty encompasses not only the specific eighteenth-century arrangements of establishment and toleration but the developing understanding, refined through Reconstruction and beyond, of what genuine religious equality requires. To freeze the tradition at any moment is to betray rather than preserve it.

This dynamic conception rescues tradition-based argument from its most damaging objection—that it entrenches historical injustice by presenting past exclusions as normative. When tradition is understood as an argument about its own animating principles, the exclusion of women from public life or the subordination of racial minorities appears not as constitutive of the tradition but as inconsistent with its deepest commitments.

The interpretive task becomes reconstructive rather than archaeological. Judges asking whether a claimed right is "deeply rooted" must inquire not only into historical practice but into the principles that best explain why particular practices were valued—and whether those principles now support extending protection to previously unrecognized claims.

Skeptics will object that this method dissolves tradition into judicial construction, allowing interpreters to declare whatever they favor to be the "true" tradition. The concern is real but overstated. Dynamic tradition operates under discipline: proposed reconstructions must fit substantial historical practice, cohere with broader constitutional structure, and survive critical scrutiny from within the interpretive community that keeps the tradition alive.

Takeaway

A tradition that cannot change is not a tradition but a fossil. The genuine question is not whether traditions evolve but whether particular developments extend or betray the principles that gave the tradition its point.

Constitutional tradition, rightly conceived, occupies neither the totemic position assigned by rigid originalism nor the marginal role suggested by unmoored progressivism. It is one indispensable resource among several through which constitutional communities work out the meaning of their fundamental commitments across generations.

The theoretical demands are considerable. Interpreters must specify which function tradition performs in a given argument, justify their choices about level of generality, and treat tradition as living practice rather than frozen inheritance. Meeting these demands requires philosophical seriousness that much contemporary doctrine lacks.

What emerges is a chastened but consequential role for tradition. It disciplines constitutional argument by anchoring it in shared historical experience while remaining open to the reconstructive work through which each generation contributes to an unfinished conversation about liberty, equality, and self-government.