Understanding Originalism in Constitutional Interpretation

Originalism is a school of constitutional interpretation that holds that the meaning of the Constitution’s text is fixed at the time it was ratified. Adherents argue that this approach constrains judicial discretion and preserves democratic legitimacy by preventing judges from reading their own values into the document. Within originalism, there are several distinct strands. Original intent looks to the subjective motivations of the Framers. Original public meaning, now the dominant variant, asks how a reasonable person at the time of ratification would have understood the text. A third, original methods originalism, asks how the law’s interpretive rules in 1791 would have applied. These distinctions matter greatly when analyzing the Ninth Amendment, because the amendment’s text is extraordinarily open‑textured.

The Ninth Amendment: Text and History

The Ninth Amendment reads: “The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.” It was added as part of the Bill of Rights in 1791, largely at the insistence of Anti‑Federalists who feared that listing some rights would imply that the federal government could regulate everything else. James Madison, the amendment’s architect, introduced it to calm those fears. In his speech to the House of Representatives on June 8, 1789, Madison explained that it would protect “those rights which are not enumerated” and would prevent any “unjust and arbitrary” exercise of power.

The historical context reveals that the amendment was a response to the Federalist‑Anti‑Federalist debate over whether a bill of rights was necessary or dangerous. Alexander Hamilton, in Federalist No. 84, famously argued that a bill of rights was not only unnecessary but “dangerous,” because it would imply that the government had powers over everything not explicitly denied. The Ninth Amendment was intended to rebut that critique by making clear that the enumeration of certain rights (freedom of speech, religion, etc.) did not mean the people had surrendered all unlisted ones. Early American legal thinkers, such as St. George Tucker and Joseph Story, treated the amendment as a mere “rule of construction” rather than an independent source of rights.

Originalist Approaches to the Ninth Amendment

Applying originalism to the Ninth Amendment is far from straightforward. Because the amendment does not identify the concrete rights it protects, originalists must determine what the Framers and ratifiers understood by “retained by the people.” This requires reconstructing the late‑18th‑century legal and philosophical landscape.

The Natural‑Rights Background

Most historians agree that the Ninth Amendment drew on the theory of natural rights that animated the Declaration of Independence. For Madison and his contemporaries, “rights retained by the people” referred to those pre‑political rights that individuals possess by virtue of their humanity—rights that government cannot legitimately invade. Blackstone’s Commentaries and the writings of John Locke were widely read. The amendment thus served as a constitutional placeholder for the entire domain of natural liberty, a domain that could not be exhaustively listed. Originalists like Professor Randy Barnett argue that the Ninth Amendment was meant to guarantee that unenumerated natural rights would receive the same judicial protection as enumerated ones. Barnett’s “presumption of liberty” theory draws directly on this historical foundation.

Other originalists, however, are more cautious. Judge Robert Bork, a famous originalist, famously called the Ninth Amendment an “inkblot” that could not be given principled meaning. More recently, scholars like Thomas B. McAffee have argued that the original understanding was narrower: the amendment simply prevented the denial of rights that were already protected by state constitutions or common law, but did not create a federal judicial power to recognize new ones. This internal debate among originalists shows that the amendment’s historical meaning is contested even among those who share the same interpretive methodology.

Textualism and the Ninth Amendment

A close textual analysis reinforces the idea that the amendment is a rule against interpretive inference: it forbids courts from drawing a negative implication from the enumeration of rights. The text does not say “there are unenumerated rights that courts shall enforce.” Instead, it says the enumeration “shall not be construed to deny or disparage” those rights. This is a directive to judges about how to read the rest of the Constitution, not a freestanding grant of power. Original‑public‑meaning originalists therefore tend to see the Ninth Amendment as reinforcing a background principle of limited federal power, rather than as a sword to strike down laws.

That interpretation dovetails with the Tenth Amendment, which reserves unenumerated powers to the states or the people. Together, the Ninth and Tenth Amendments act as a double‑lock on federal authority: the federal government may exercise only those powers granted, and it may not infringe rights not listed. For originalists, this twin structure is the Constitution’s primary safeguard for unenumerated liberty.

Landmark Cases and the Ninth Amendment

The Supreme Court has rarely relied on the Ninth Amendment as a primary holding. Its most famous invocation came in Griswold v. Connecticut (1965), where Justice Arthur Goldberg’s concurrence argued that the right to marital privacy was among the “rights retained by the people” under the Ninth. The majority opinion in Griswold instead used a “penumbra” theory from the Bill of Rights, but Goldberg’s reasoning sparked a wave of academic interest. Later, in Roe v. Wade (1973), the Court cited the Ninth Amendment only in passing, grounding its abortion‑rights ruling in the Due Process Clause.

More recently, the Court has largely avoided the Ninth Amendment. In Dobbs v. Jackson Women’s Health Organization (2022), which overruled Roe, the majority opinion did not mention the Ninth Amendment. That silence is notable. Critics of originalism argue that the Court’s unwillingness to give the Ninth Amendment independent force shows that originalism is applied selectively: originalists are quick to invoke the amendment when it aligns with their preferred outcomes, but reluctant to use it as a meaningful check on government power. Defenders reply that the Ninth Amendment was never intended to create a judicial roving commission; it is a principle of construction, not a source of substantive rights.

Contemporary Scholarly Debates

The originalist interpretation of the Ninth Amendment remains a lively battleground. Several key positions have emerged.

Randy Barnett and the “Presumption of Liberty”

Barnett, a leading originalist scholar, contends that the Ninth Amendment was designed to protect natural liberty rights and that courts should enforce them unless the government can show a compelling justification. In his book Restoring the Lost Constitution, he marshals extensive historical evidence from the ratification debates and early American legal sources. For Barnett, the original meaning of “rights retained by the people” includes both common‑law rights and fundamental natural rights. He urges judges to apply a “presumption of liberty” that puts the burden on government when it infringes unenumerated rights. This approach would give the Ninth Amendment real bite, for example in cases involving economic liberty, bodily autonomy, and parenting decisions.

The “Rule of Construction” View

Other originalists, such as Professor Kurt Lash, argue that the Ninth Amendment is purely a rule of construction—a textual signal that the Constitution does not create a hierarchy between enumerated and unenumerated rights. Lash’s extensive historical research, summarized in his book Lost Texts and the Meaning of the Constitution, indicates that the Framers understood the amendment to prevent courts from denying the existence of state‑law rights, not to create new federal rights. Under this view, the Ninth Amendment has little to no role in federal constitutional adjudication; its primary function is to preserve the rights that states already protected. Lash’s interpretation has been influential among judges on the conservative side of the bench.

Critical and Pragmatic Perspectives

Some scholars challenge the entire originalist enterprise as applied to the Ninth Amendment. Legal historian Jack Rakove argues that the Framers deliberately used vague language because they could not agree on a list of unenumerated rights, and that this ambiguity cannot be resolved by historical investigation alone. Others, like Professor Suzanna Sherry, see the Ninth Amendment as an invitation to evolving constitutional interpretation: its open‑endedness allows courts to protect new rights as society changes. These critics contend that originalism, when applied to such a deliberately malleable provision, collapses into either irrelevance or results‑oriented judging.

Originalism and the Future of Unenumerated Rights

The debate over the Ninth Amendment is not merely academic. It has direct implications for hot‑button issues such as privacy, same‑sex marriage, and reproductive rights. If the Ninth Amendment is read as a broad protection for natural liberty, then even after Dobbs some unenumerated rights might receive constitutional protection. Conversely, if it is read as a narrow rule of construction, then those rights must be defended through legislation or state constitutions. The originalist methodology itself does not dictate a single answer; the historical evidence is contested.

Some courts have begun to engage more seriously with the Ninth Amendment. For example, in McDonald v. City of Chicago (2010), which incorporated the Second Amendment, Justice Clarence Thomas in a concurrence argued that the Ninth Amendment supports the view that the right to keep and bear arms is a fundamental right retained by the people. His reasoning drew on Barnett’s scholarship. Yet the majority in that case relied on the Due Process Clause. It remains to be seen whether a future Supreme Court will give the Ninth Amendment independent weight.

Conclusion

Originalism provides a historically rigorous framework for interpreting the Ninth Amendment, but it does not yield a single, predetermined outcome. The amendment’s text, its ratification history, and the philosophical background of natural rights all inform the originalist debate. Whether one favors Barnett’s robust protection of unenumerated rights or Lash’s more modest rule of construction, the core challenge is the same: to give meaning to a provision that the Framers deliberately left undefined. That challenge will persist as long as the Constitution governs a changing society. Ultimately, the Ninth Amendment reminds us that the Constitution is not a code that answers every question, but a framework that leaves room for democratic self‑rule—and for the rights that the people, acting through their constitutional culture, continue to retain.