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The U.S. Constitution protects freedom of speech, the right to a fair trial, and other well-known liberties. But some of your most important rights aren’t written down anywhere.
Hidden in the Bill of Rights is a single sentence that has puzzled scholars and shaped American society for over two centuries. 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.”
In plain English, the Constitution acknowledges that you have fundamental rights beyond those specifically listed in the first eight amendments. It explicitly commands that these unlisted rights cannot be dismissed simply because they aren’t named in the Bill of Rights.
Since the mid-20th century, this once-dormant provision has become a legal battleground. It now forms the foundation of arguments over privacy rights, reproductive freedom, and government power in the digital age.
Why the Ninth Amendment Exists
The Ninth Amendment wasn’t an afterthought. It was a crucial solution to a problem that threatened to tear apart the young United States before it began.
Its existence stems from a fierce clash between the nation’s first political factions—the Federalists and Anti-Federalists—over whether to include a Bill of Rights in the Constitution.
The Constitutional Convention‘s Big Omission
When delegates finished their work at the Constitutional Convention in 1787, their document contained no bill of rights. Virginia’s George Mason proposed adding one at the last minute, but delegates unanimously rejected the idea.
This omission became the most powerful weapon for those who opposed the new Constitution.
The Federalist Position: Why Rights Lists Are Dangerous
Supporters of the Constitution, known as Federalists, argued that a bill of rights was unnecessary and actively dangerous. Alexander Hamilton laid out their argument in The Federalist No. 84.
The Federalists’ logic was straightforward: the Constitution created a federal government with limited and enumerated powers. It only had the specific powers listed in the document, and no more.
Hamilton asked, “Why should it be said that the liberty of the press shall not be restrained, when no power is given by which restrictions may be imposed?“
The Federalists feared a classic legal principle: expressio unius est exclusio alterius, meaning “the expression of one thing is the exclusion of another.” They worried that creating a list of specific rights would suggest two dangerous things.
First, it might imply the government had power to do everything else not on the list. Second, it would suggest that any right not included wasn’t protected and was therefore surrendered to government control.
Because listing every human right would be impossible, they argued that listing any at all was perilous.
The Anti-Federalist Position: Rights Need Explicit Protection
Opponents of the Constitution, dubbed Anti-Federalists, viewed this logic as naive and reckless. Figures like George Mason and Patrick Henry looked at the broad powers granted to Congress and saw the seeds of tyranny.
They particularly feared Congress’s power to make all laws “necessary and proper” for executing its duties and to provide for the “general welfare.” Combined with the Supremacy Clause making federal law supreme, they believed these provisions would allow the national government to claim vast “implied powers” and systematically erode individual liberties and state authority.
For Anti-Federalists, the absence of a bill of rights was a deal-breaker. They demanded a clear declaration of rights to shield individual citizens from an inevitable powerful central government.
Several powerful states, including Massachusetts and Virginia, only agreed to ratify the Constitution with the firm understanding that a bill of rights would be added as soon as the new government formed.
Madison’s Brilliant Compromise
James Madison of Virginia, the Constitution’s primary architect and now a key member of the first Congress, stepped into this political firestorm. Though initially skeptical about needing a bill of rights, he recognized the political necessity of creating one to unify the country and fulfill ratification promises.
Madison also took the Federalist argument seriously, calling their concern about disparaging unlisted rights “one of the most plausible arguments I have ever heard urged against the admission of a bill of rights.”
His solution was political and legal genius. He proposed amendments to protect specific rights, but included one final provision designed specifically to neutralize the Federalists’ concerns.
During congressional debates, Madison explained his strategy: “It has been objected also against a bill of rights, that, by enumerating particular exceptions to the grant of power, it would disparage those rights which were not placed in that enumeration… I conceive, that it may be guarded against. I have attempted it, as gentlemen may see by turning to the last clause of the fourth resolution.”
That clause became the Ninth Amendment. It was a rule of interpretation—a direct instruction to future generations on how not to read the Constitution.
The amendment allowed for creating a Bill of Rights, satisfying Anti-Federalists, while including a provision that explicitly forbade the misinterpretation Federalists feared. As Justice Joseph Story later explained, the amendment was “manifestly introduced to prevent any perverse, or ingenious misapplication” of the principle that affirming particular cases implies negation in all others.
The amendment wasn’t designed to create new rights, but to create a rule for reading the existing ones, ensuring that constitutional silence could never be mistaken for surrendering liberty.
What the Ninth Amendment Actually Means
The Ninth Amendment’s origin as a clever compromise solved an 18th-century political crisis, but created an enduring legal debate. For over 200 years, judges, scholars, and citizens have argued over its true meaning.
Is it merely a technical instruction for legal interpretation—a “shield” to protect against flawed arguments? Or is it a “sword” that actively protects unenumerated rights, a wellspring of liberty that judges can and should defend?
The Shield Interpretation: A Rule of Construction
The oldest and historically dominant view holds that the Ninth Amendment doesn’t grant or protect any rights on its own. Instead, it’s a “rule of construction”—a guide for interpreting the rest of the Constitution.
According to this perspective, its sole purpose is preventing the Bill of Rights from being used to limit other rights. The Supreme Court has called it a “sort of constitutional ‘saving clause’” that stops people from arguing that because some rights are listed, others don’t exist.
This interpretation aligns with the amendment’s historical origins. Justice Joseph Story explained it was simply a tool to prevent the “perverse” misapplication of the legal principle that affirming some things implies negating all others.
Modern originalist and textualist jurists, most notably the late Supreme Court Justice Antonin Scalia, forcefully articulate this view. Scalia argued that while the amendment acknowledges other rights exist, it doesn’t empower judges to enforce them.
In a famous dissent, he wrote that the Ninth Amendment’s “refusal to ‘deny or disparage’ other rights is far removed from affirming any one of them, and even further removed from authorizing judges to identify what they might be.”
For this school of thought, asking judges to enforce unlisted rights based on the Ninth Amendment is asking them to create law, not interpret it. They view the amendment as a “constitutional inkblot” that judges shouldn’t use to invent new rights.
This perspective prioritizes the democratic process, where elected representatives make laws, over the power of unelected judges to define and enforce unenumerated liberties.
The Sword Interpretation: A Wellspring of Rights
The opposing view argues that the Ninth Amendment is far more than a simple rule of construction. It’s a positive affirmation that people retain real, fundamental, and legally protectable rights beyond those listed in the first eight amendments.
Proponents contend that treating the amendment as a mere “truism” with no legal effect ignores the Framers’ intent and renders the text meaningless.
This perspective connects the phrase “rights… retained by the people” to the Founders’ belief in natural rights—the idea that all humans possess inherent liberties that predate any government.
Historical evidence supports this connection. James Madison’s handwritten notes for his speech introducing the Bill of Rights refer to “natural rights, retained as speach,” indicating that freedom of speech was just one example of broader retained natural rights.
Even more explicitly, a draft by Roger Sherman of Connecticut, a key drafting committee member, identified the retained rights as “natural rights,” listing as examples the rights of conscience, acquiring property, and pursuing happiness and safety.
From this viewpoint, the Ninth Amendment is a constitutional mandate for the judiciary to guard these fundamental, unenumerated liberties. It doesn’t require judges to create an exhaustive list of every retained right. Instead, it may require them to apply a “presumption of liberty,” placing the burden on government to justify any law that infringes on personal freedom.
This view sees an active judiciary as essential for protecting the full spectrum of human liberty from government overreach.
Five Scholarly Models
The debate has spawned complex academic scholarship. Since the 1980s, legal historians have proposed at least five distinct models to explain the amendment’s original meaning:
| Scholarly Model | Key Proponent(s) | Core Argument |
|---|---|---|
| Individual Natural Rights | Randy Barnett | The “other rights” are unenumerated natural liberties of individuals (e.g., to acquire property, pursue happiness). The amendment ensures they have the same force as enumerated rights and mandates a “presumption of liberty” against government regulation. |
| Federalism Model | Kurt Lash | The amendment limits federal power by requiring strict construction of Congress’s enumerated powers, especially implied powers. It’s a rule protecting rights by constraining federal reach into local self-government areas. |
| State Law Rights Model | Russell Caplan | The “other rights” exist in state constitutions and common law. The amendment prevents them from being automatically displaced by the federal Constitution, but doesn’t grant them federal protection. |
| Residual Rights Model | Thomas McAffee | The amendment is a “hold harmless” clause clarifying that the Bill of Rights shouldn’t infer any expansion of federal power. The “retained rights” are simply everything not surrendered to the federal government. |
| Collective Rights Model | Akhil Amar | The “other rights” are primarily collective rights of “the people,” such as the right to alter or abolish government. It wasn’t intended to protect counter-majoritarian individual rights. |
The Supreme Court’s Transformation
For over 170 years, the Ninth Amendment lay dormant. Litigants occasionally invoked it, but the Supreme Court consistently dismissed their claims with little discussion, treating it as a constitutional relic.
That changed in 1965 with a landmark case that transformed the amendment from forgotten footnote to living, contested law. That case was Griswold v. Connecticut.
Griswold v. Connecticut: The Turning Point
The case centered on a rarely enforced but active Connecticut law from 1873—a “Little Comstock Act”—that made it a crime to use “any drug, medicinal article or instrument for the purpose of preventing conception.”
In 1961, Estelle Griswold, Executive Director of the Planned Parenthood League of Connecticut, and Dr. C. Lee Buxton, a Yale School of Medicine physician, opened a birth control clinic in New Haven to challenge the law. They were promptly arrested, convicted as accessories, and fined $100.
Their case reached the Supreme Court, which faced a difficult question: how could it strike down a law that violated a right—the right to marital privacy—that wasn’t explicitly written anywhere in the Constitution?
Justice Douglas’s “Penumbras and Emanations”
Writing for the 7-2 majority, Justice William O. Douglas crafted one of the most creative and controversial opinions in Court history. He argued that specific rights listed in the Bill of Rights weren’t isolated islands but had “penumbras, formed by emanations from those guarantees” that help give them life and substance.
Douglas argued that explicit rights cast shadows of related, unstated rights. He found that a “zone of privacy” was created by the combined light of several amendments: the First Amendment’s right of association, the Third Amendment’s prohibition on quartering soldiers in homes, the Fourth Amendment’s protection against unreasonable searches, and the Fifth Amendment’s protection against self-incrimination.
He cited the Ninth Amendment as proof that the Framers believed such unenumerated rights existed.
Douglas’s opinion reached its rhetorical peak when he asked, “Would we allow the police to search the sacred precincts of marital bedrooms for telltale signs of the use of contraceptives? The very idea is repulsive to the notions of privacy surrounding the marriage relationship. We deal with a right of privacy older than the Bill of Rights.”
In his formulation, the Ninth Amendment was one ingredient in a constitutional recipe for privacy, but not the main course.
Justice Goldberg’s Influential Concurrence
While Douglas’s “penumbra” theory carried the day, a concurring opinion by Justice Arthur Goldberg gave the Ninth Amendment its most thorough judicial analysis. Goldberg, joined by Chief Justice Earl Warren and Justice William Brennan, argued that the Ninth Amendment was key to the case.
He wrote that the amendment’s language and history “reveal that the Framers of the Constitution believed that there are additional fundamental rights, protected from governmental infringement, which exist alongside those fundamental rights specifically mentioned in the first eight constitutional amendments.”
To ignore the right to marital privacy simply because it wasn’t listed in so many words, he argued, “is to ignore the Ninth Amendment and to give it no effect whatsoever.”
Goldberg was careful to state that the Ninth Amendment wasn’t an independent source of rights that could be applied against states on its own. Rather, he saw it as powerful evidence that the concept of “liberty” protected by the Fourteenth Amendment’s Due Process Clause wasn’t limited to the rights specified in the first eight amendments.
For Goldberg, the Ninth Amendment was the Constitution’s explicit command to read “liberty” broadly and protect rights fundamental to a free society.
The Dissenting View
Justices Hugo Black and Potter Stewart issued powerful dissents. They accused the majority of judicial activism, arguing that the Court was using the Ninth Amendment and Due Process Clause to strike down a law simply because they found it “unwise or unnecessary.”
Justice Black wrote that he could find no “right to privacy” in the Constitution and that the Court had no business inventing one. Justice Stewart famously dismissed the Ninth Amendment’s role, arguing that, like the Tenth Amendment, it “states but a truism that all is retained which has not been surrendered” and didn’t give judges license to enforce their personal views of what rights should be protected.
Your Unlisted Rights Today
The Griswold decision opened Pandora’s box. By breathing life into the Ninth Amendment and unenumerated rights, the Supreme Court set the stage for decades of legal battles over the most personal aspects of American life.
While the Court has often been hesitant to rely directly on the Ninth Amendment, preferring the Fourteenth Amendment’s Due Process Clause, the idea that liberties aren’t confined to a written list has become powerful in constitutional law.
Bodily Autonomy and Personal Choice
The privacy right established in Griswold became the foundation for significant and divisive Supreme Court decisions. Eight years later, in Roe v. Wade (1973), the Court extended this right to encompass a woman’s decision to have an abortion.
However, the Court in Roe deliberately grounded the right primarily in the Fourteenth Amendment’s “concept of personal liberty,” not the Ninth Amendment. While it cited Griswold as key precedent, this move signaled reluctance to lean heavily on the more ambiguous Ninth Amendment for such a monumental ruling.
The spirit of the Ninth Amendment—protecting unenumerated, fundamental personal choices—has echoed through other law areas. The Supreme Court has recognized a fundamental right of parents to make decisions about their children’s care, custody, and control, even when not explicitly listed in the Constitution, as seen in Troxel v. Granville (2000).
Similarly, in Lawrence v. Texas (2003), the Court struck down a law criminalizing same-sex intimacy, protecting a right to personal autonomy in private relationships that appears nowhere in the constitutional text.
Following the Supreme Court’s 2022 decision in Dobbs v. Jackson Women’s Health Organization, which overturned Roe v. Wade, the debate over unenumerated rights has intensified. Legal scholars and advocates increasingly frame the issue as a broader, fundamental “right to bodily autonomy.”
The argument holds that the right to make crucial decisions about one’s own body and health is one of the most basic “rights… retained by the people.” While courts may continue using the Fourteenth Amendment as the primary legal vehicle, the Ninth Amendment provides essential constitutional justification for recognizing that such core liberty exists and deserves protection, even without being explicitly named.
Digital Privacy in the Information Age
The greatest modern challenge for unenumerated rights lies in applying 18th-century principles to 21st-century technology. The Framers never imagined smartphones, social media, and massive data-gathering corporations, where government agencies can assemble detailed digital dossiers on any citizen instantly.
This reality has given rise to legal arguments for a right to “informational privacy”—the right to control the collection, use, and dissemination of personal data about oneself.
Most legal challenges to government surveillance and data collection are brought under the Fourth Amendment, which protects “the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.” But the philosophical argument for extending this protection to the digital realm connects deeply to the Ninth Amendment.
The core question is whether the right to be secure in your personal data—your “digital effects“—is one of the “other rights retained by the people.”
The Ninth Amendment serves as a constitutional reminder that rights aren’t frozen in 1791. It provides justification for adapting the concept of liberty to meet new and unforeseen threats. Legal scholars argue that the principles of privacy and personal autonomy the Court recognized in Griswold must evolve to protect individuals from the unprecedented intrusive power of modern technology.
The Ninth Amendment acts as the Constitution’s built-in mechanism for ensuring that liberty remains meaningful, capable of defending citizens against future tyrannies, whether physical or digital.
Current Legal Battles
The Ninth Amendment continues to influence modern constitutional interpretation, even when courts don’t cite it directly. Its philosophical foundation—that fundamental rights exist beyond those explicitly listed—shapes how judges approach new legal challenges.
Recent court cases have invoked Ninth Amendment principles in disputes over:
Vaccine mandates and medical autonomy: Some challenges to COVID-19 vaccine requirements have argued that the right to make personal medical decisions is a fundamental liberty retained by the people, even if not explicitly enumerated.
Data protection and surveillance: Privacy advocates argue that comprehensive government data collection violates unenumerated rights to informational privacy and digital autonomy.
Parental rights in education: Cases challenging school policies around gender identity and curriculum often invoke the fundamental right of parents to direct their children’s upbringing and education.
End-of-life decisions: Legal challenges to assisted suicide bans sometimes argue that the right to die with dignity is a fundamental liberty that government cannot infringe without compelling justification.
State Constitutional Developments
While federal courts remain cautious about relying directly on the Ninth Amendment, many state constitutions contain explicit protections for unenumerated rights. These provisions have proven more legally robust in protecting individual liberties.
For example, California’s constitution contains a right to privacy that has been interpreted to protect against both government surveillance and private data collection. Montana’s constitution includes a right to a “clean and healthful environment,” demonstrating how modern constitutions can enumerate rights the Framers never imagined.
These state-level developments show how the Ninth Amendment’s core principle—that rights exist beyond those written down—continues to influence American constitutional development.
The Amendment’s Enduring Significance
The Ninth Amendment remains one of the Constitution’s most enigmatic provisions. Its sparse text has generated volumes of scholarly debate and continues to influence major constitutional decisions, often from the shadows.
Whether viewed as a mere rule of construction or as a wellspring of fundamental rights, the amendment serves a crucial function in American constitutional law. It prevents constitutional interpretation from becoming overly rigid and provides a textual foundation for the principle that liberty is broader than any written list could capture.
The amendment’s significance extends beyond legal doctrine. It embodies a foundational American belief that individuals possess inherent rights that government cannot legitimately infringe, regardless of whether those rights are explicitly written down.
As technology advances and society evolves, new challenges to individual liberty will emerge that the Framers could never have anticipated. The Ninth Amendment ensures that the Constitution remains a living document capable of protecting freedom in circumstances its authors never imagined.
The debate over the amendment’s proper interpretation reflects deeper disagreements about the role of courts in a democracy and the source of individual rights. Should judges be passive interpreters of written text, or active guardians of fundamental liberties? Do rights come from government or exist independently of it?
These questions remain as relevant today as they were when Madison first proposed the amendment in 1789. The Ninth Amendment doesn’t answer them definitively, but it ensures they remain part of our constitutional conversation.
In an era of expanding government power and technological surveillance, the amendment’s core message remains vital: your rights are not limited to what’s written on a piece of paper, no matter how sacred that paper might be.
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