Substantive due process is the most dramatic example of what the Restorationist framework calls interpretive drift: the quiet migration of judicial power from adjudicating law to manufacturing it. The 14th Amendment’s Due Process Clause was drafted as a procedural guarantee — a shield against arbitrary deprivation of life, liberty, or property. It was never a charter for the Court to identify, define, and enforce new categories of “liberty” untethered from text, history, or structure. Yet that is precisely what substantive due process became.
The doctrine rests on a simple but radical move: treating “liberty” as an empty vessel the Court may fill with whatever rights it deems fundamental. Once this move is accepted, the judiciary ceases to be an interpreter and becomes an allocator of social meaning. The Constitution’s architecture is inverted. Instead of the people delegating limited powers to government, the Court assumes the authority to declare which unenumerated personal choices are beyond democratic reach. The written Constitution becomes secondary to the Court’s evolving sense of moral necessity.
From a Restorationist perspective, the problem is not the outcomes of particular cases but the method itself. Substantive due process severs rights from their constitutional anchors. It replaces the discipline of text with the fluidity of judicial intuition. It transforms the Due Process Clause from a procedural safeguard into a roving mandate for the Court to constitutionalize cultural preferences. This is not interpretation; it is construction — and construction without consent.
The deeper issue is architectural. A republic depends on stable boundaries: between branches, between federal and state authority, between lawmaking and adjudication. Substantive due process erodes all three. It invites the judiciary to act as a super‑legislature, to impose national uniformity on matters the Constitution leaves to states, and to elevate judicial reasoning above democratic deliberation. The doctrine’s defenders call this the protection of “ordered liberty.” But ordered liberty is not liberty ordered by judges; it is liberty ordered by the Constitution.
The Restorationist critique is therefore not reactionary but structural. Substantive due process is illegitimate not because it protects controversial rights, but because it bypasses the constitutional mechanisms for creating them. A free people may expand their rights through amendment or legislation. What they may not do — without dissolving the architecture of self‑government — is allow nine unelected officials to redefine the meaning of “liberty” whenever cultural winds shift.
In this sense, substantive due process is a form of constitutional drift disguised as jurisprudence. It replaces the fixed guardrails of the written Constitution with the fluid sensibilities of the Court. It elevates judicial preference over democratic judgment. And it transforms the 14th Amendment from a procedural guarantee into an instrument of judicial policymaking.
A Restorationist jurisprudence would reverse this drift. It would restore the Due Process Clause to its original function: a procedural protection, not a substantive fountainhead. It would return unenumerated rights to the people and their legislatures. And it would reestablish the Constitution — not judicial invention — as the source of American liberty.
