The Fourteenth Amendment to the United States Constitution is one of the most consequential legal documents in American history. Ratified in 1868, in the aftermath of the Civil War, it was designed to secure the rights of newly freed enslaved people and to fundamentally reshape the relationship between the federal government and the states. Over the past 150 years, its provisions have been the foundation for landmark Supreme Court decisions on civil rights, due process, and equal protection. Understanding the basic facts about this amendment is essential for anyone who wants to grasp the legal framework that protects individual rights today.

Historical Context and Ratification

The Fourteenth Amendment was one of three Reconstruction Amendments adopted between 1865 and 1870. The Thirteenth Amendment abolished slavery; the Fifteenth Amendment prohibited voting discrimination based on race. The Fourteenth Amendment sits between them as the structural backbone, defining citizenship and imposing federal standards on state laws. After President Andrew Johnson's lenient Reconstruction policies allowed Southern states to pass "Black Codes" that severely restricted the rights of African Americans, Congress—dominated by Radical Republicans—drafted the amendment to nullify those laws and to put the promise of equality into constitutional text.

Passed by Congress on June 13, 1866, and ratified on July 9, 1868, the amendment overturned the Supreme Court's infamous Dred Scott v. Sandford decision (1857), which had held that people of African descent could never be U.S. citizens. Section 1 of the amendment directly repudiated that ruling by declaring that all persons born or naturalized in the United States are citizens of the nation and of the state where they reside.

Key Provisions of the Fourteenth Amendment

The Fourteenth Amendment is composed of five sections, but Section 1 contains the most powerful and frequently litigated language. Understanding these clauses is critical.

The Citizenship Clause

Section 1 begins: "All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside." This clause established birthright citizenship—a principle that remains a subject of legal and political debate today. It ensures that any child born on U.S. soil (with limited exceptions, such as children of foreign diplomats) automatically becomes a U.S. citizen, regardless of the parents’ immigration status. The clause was a direct response to the Dred Scott ruling and cemented the idea that citizenship is a matter of federal law, not state discretion.

The Due Process Clause

The same section continues: "… nor shall any State deprive any person of life, liberty, or property, without due process of law." This clause applies the same guarantee that the Fifth Amendment imposes on the federal government to the states. Due process has two dimensions: procedural due process ensures fair procedures—notice, hearing, impartial judge—before the government takes away someone’s life, liberty, or property; substantive due process protects certain fundamental rights from government interference, even if the procedures are fair. Through substantive due process, the Supreme Court has recognized rights to privacy, marriage, contraception, and bodily autonomy. The Due Process Clause is also the vehicle for incorporation—the doctrine that most provisions of the Bill of Rights apply to the states through the Fourteenth Amendment.

The Equal Protection Clause

Section 1 also commands: "nor deny to any person within its jurisdiction the equal protection of the laws." This simple phrase has become the primary tool for challenging discriminatory laws. The Equal Protection Clause requires the government to treat similarly situated people alike. Its meaning has been fleshed out through decades of case law, establishing tiers of judicial scrutiny. Most laws are reviewed under the rational basis test—they are presumed valid if they have a reasonable connection to a legitimate government interest. But laws that discriminate based on race, national origin, or religion trigger strict scrutiny, the most rigorous review, and are almost always struck down unless they serve a compelling interest and are narrowly tailored. Gender discrimination receives intermediate scrutiny, a middle tier of review. The Equal Protection Clause was the constitutional basis for ending racial segregation in Brown v. Board of Education (1954) and for invalidating laws barring interracial marriage in Loving v. Virginia (1967).

The Privileges or Immunities Clause

Sandwiched between the Citizenship Clause and the Due Process Clause is the phrase: "No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States." This clause was intended to protect fundamental national rights from state infringement. However, the Supreme Court’s 1873 decision in Slaughter-House Cases read this clause very narrowly, holding that it only protects rights that are "incident to national citizenship" (like the right to travel to the seat of government or to access federal courts). That decision essentially gutted the clause as a source of rights for over a century. Some modern justices have argued for its revival, but so far it remains marginalized, with the Due Process Clause carrying the burden of protecting most individual rights against state action.

The Fourteenth Amendment does not list specific rights in the way the Bill of Rights does. Instead, it establishes broad principles that courts have applied to protect a wide range of liberties. Below are some of the key rights that have been recognized under the amendment.

Right to Citizenship and National Belonging

Birthright citizenship under the Citizenship Clause means that every person born in the United States (and subject to its jurisdiction) is a citizen. This right cannot be taken away by Congress or the states except through the narrow channels provided in Section 1. The Supreme Court affirmed this in United States v. Wong Kim Ark (1898), holding that a child born in the United States to Chinese immigrant parents was a U.S. citizen, even though federal law at the time barred Chinese people from naturalizing. This precedent remains good law and is the basis for current debates about birthright citizenship for children of undocumented immigrants.

Protection Against Discriminatory Laws

The Equal Protection Clause is the primary safeguard against state-sponsored discrimination. It has been instrumental in challenges to laws that discriminate based on race, ethnicity, gender, sexual orientation, and other classifications. For example, in Obergefell v. Hodges (2015), the Court held that state bans on same-sex marriage violated both the Due Process and Equal Protection Clauses. Similarly, Grutter v. Bollinger (2003) allowed race-conscious admissions in higher education under strict scrutiny, while later decisions like Students for Fair Admissions v. Harvard (2023) tightened the rules and effectively ended affirmative action in college admissions. Equal Protection continues to be a live and contentious field of constitutional law.

Procedural due process requires that before the government takes away a person’s rights, that person must receive notice and an opportunity to be heard in a meaningful way. This applies to criminal trials, civil forfeiture actions, termination of parental rights, revocation of parole, and many other government actions. The Supreme Court uses a balancing test established in Mathews v. Eldridge (1976) to determine what procedures are constitutionally required: the private interest affected, the risk of erroneous deprivation under the current procedures, and the government’s interest in efficiency and cost.

Incorporation of the Bill of Rights

Through the Due Process Clause, the Fourteenth Amendment has made most of the Bill of Rights enforceable against the states. This process, called selective incorporation, began in earnest in the early 20th century. The First Amendment freedoms of speech, press, assembly, and religion were incorporated early. Other rights—like the right to bear arms (McDonald v. Chicago, 2010) and the right to a jury trial in civil cases for large sums—have been incorporated more recently. As of today, almost every right in the Bill of Rights applies to the states, with only a few exceptions (such as the Third Amendment quartering of soldiers, the Fifth Amendment’s grand jury indictment requirement, and the Seventh Amendment’s civil jury trial rule for cases below a certain amount). The Fourteenth Amendment thus serves as the bridge that extends federal constitutional protections into every state courtroom and police station.

Fundamental Rights and Substantive Due Process

Substantive due process protects certain rights that are "deeply rooted in this Nation’s history and tradition" even if they are not enumerated in the Constitution. These include the right to marry, the right to have children, the right to raise one’s children as one sees fit, the right to use contraception, the right to engage in private consensual sexual activity, and the right to abortion (as established in Roe v. Wade 1973 and modified by Planned Parenthood v. Casey 1992). However, in Dobbs v. Jackson Women’s Health Organization (2022), the Supreme Court overruled Roe and Casey, holding that the right to abortion is not a fundamental right protected by the Fourteenth Amendment. This decision returned the regulation of abortion to the states and sparked intense debate about the scope of substantive due process. The future of this doctrine remains uncertain, but it continues to protect rights like marriage and family integrity.

Impact on Civil Rights and Social Change

The Fourteenth Amendment has been the legal engine driving the expansion of civil rights in the United States. Without it, many of the landmark victories of the civil rights movement, the women’s rights movement, and the LGBTQ+ rights movement would have been impossible.

Ending Racial Segregation

In Plessy v. Ferguson (1896), the Supreme Court upheld racial segregation under the "separate but equal" doctrine, concluding that the Equal Protection Clause was not violated as long as facilities were nominally equal. This decision legitimized Jim Crow laws throughout the South for nearly 60 years. The Court finally overturned Plessy in Brown v. Board of Education (1954), holding that racial segregation in public schools was inherently unequal. Chief Justice Earl Warren wrote that "separate educational facilities are inherently unequal," and that segregation "generates a feeling of inferiority… that may affect their hearts and minds in a way unlikely ever to be undone." Brown was the turning point, and subsequent cases applied the same reasoning to other public facilities, as well as to voting, housing, and employment.

Protecting Voting Rights

The Fourteenth Amendment, combined with the Fifteenth Amendment, has been used to challenge voter discrimination. The Supreme Court struck down poll taxes in Harper v. Virginia Board of Elections (1966) under the Equal Protection Clause, and later cases limited racial gerrymandering and discriminatory voter ID laws. However, recent decisions such as Shelby County v. Holder (2013) weakened the Voting Rights Act of 1965, which had been based in part on Congress’s power to enforce the Fourteenth Amendment. The battle over voting rights continues, with the Fourteenth Amendment remaining a central legal argument.

Securing Marriage Equality

In Obergefell v. Hodges (2015), the Supreme Court held that the Fourteenth Amendment requires states to license and recognize same-sex marriages. Justice Kennedy’s majority opinion relied on both the Due Process Clause (protecting the fundamental right to marry) and the Equal Protection Clause (prohibiting discrimination based on sexual orientation). The decision was a milestone for LGBTQ+ rights and demonstrated the amendment’s flexibility in addressing evolving social understandings of liberty and equality.

Affirmative Action and Equal Protection

The Fourteenth Amendment’s guarantee of equal protection has also been the battleground for affirmative action. In Regents of the University of California v. Bakke (1978), the Court ruled that racial quotas were unconstitutional but that race could be one factor in admissions. Later cases, including Grutter v. Bollinger (2003), upheld narrowly tailored race-conscious policies. However, in Students for Fair Admissions v. Harvard (2023), the Court overruled that precedent, holding that race-based affirmative action in higher education violated the Equal Protection Clause. The Court emphasized that admissions programs must treat applicants as individuals and cannot use race as a stereotype or as a negative factor.

Modern Interpretations and Debates

The Fourteenth Amendment remains a living document, with its meaning constantly contested in courts, legislatures, and public discourse. Several current debates highlight its ongoing relevance.

Birthright Citizenship Under Challenge

Some political figures and legal scholars have questioned whether the Citizenship Clause should apply to children of undocumented immigrants. They argue that such children are not "subject to the jurisdiction" of the United States in the complete sense. However, the prevailing legal view—supported by the text, the Wong Kim Ark precedent, and federal statutes—is that birthright citizenship is constitutional and can only be changed through another constitutional amendment. Any attempt to reinterpret the clause administratively or through legislation would almost certainly face a constitutional challenge.

Substantive Due Process After Dobbs

The Supreme Court’s decision in Dobbs has opened the door to challenges against other substantive due process rights. Some state laws and court decisions have already questioned the right to contraception (Griswold v. Connecticut 1965) and the right to private sexual conduct (Lawrence v. Texas 2003). While the Dobbs majority claimed it was not casting doubt on those precedents, the reasoning—that rights not deeply rooted in history are not fundamental—could be used to revisit them. The future of substantive due process is one of the most important unresolved questions in constitutional law.

Equal Protection and Gender Identity

Courts are increasingly applying the Equal Protection Clause to claims of discrimination based on sexual orientation and gender identity. In Bostock v. Clayton County (2020), the Supreme Court held that Title VII of the Civil Rights Act prohibits discrimination against gay and transgender employees. That case was based on statutory interpretation, not the Fourteenth Amendment. But lower courts are now considering whether the amendment itself prohibits state laws that discriminate against transgender individuals, for example in sports, bathrooms, or medical care. These cases may eventually reach the Supreme Court and define the next frontier of equal protection.

Privileges or Immunities Revival?

A small but influential group of originalist scholars and judges argues that the Privileges or Immunities Clause should be restored as the primary vehicle for protecting fundamental rights. They point out that the Slaughter-House decision was wrongly decided and that the original meaning of the clause was to protect the fundamental rights of U.S. citizens against state infringement. Justice Clarence Thomas has repeatedly advocated for this view in concurring opinions. While the Court has not yet adopted this approach, a shift in doctrine could have major implications for gun rights, economic liberties, and other areas. In McDonald v. Chicago (2010), Justice Thomas wrote separately to argue that the right to keep and bear arms is a privilege of national citizenship enforceable under the Privileges or Immunities Clause rather than through incorporation via the Due Process Clause.

Enforcement and Section 5

Section 5 of the Fourteenth Amendment gives Congress the "power to enforce, by appropriate legislation, the provisions of this article." This grant of authority has been used to pass landmark civil rights laws, including the Civil Rights Act of 1964, the Voting Rights Act of 1965, and the Fair Housing Act of 1968. However, the Supreme Court has at times limited Congress’s enforcement power. In City of Boerne v. Flores (1997), the Court struck down the Religious Freedom Restoration Act as applied to the states, holding that Congress may only enforce the amendment’s substantive provisions, not expand or redefine them. The "congruence and proportionality" test from that case still governs Section 5 legislation. Recent proposals, such as the Equality Act, would rely on Section 5 to ban discrimination based on sexual orientation and gender identity in many areas of public life.

Conclusion: The Enduring Legacy of the Fourteenth Amendment

The Fourteenth Amendment transformed the Constitution from a compact between states and the federal government into a charter of individual liberty. Its Citizenship Clause set a standard of birthright citizenship rare among nations. Its Due Process Clause has incorporated nearly the entire Bill of Rights against the states and protected fundamental liberties that the founders could not have imagined. Its Equal Protection Clause has been the sword and shield for generations of Americans fighting for justice and inclusion. And its Privileges or Immunities Clause, though long dormant, may yet awaken to play a new role in protecting individual rights.

As the nation continues to debate the meaning of equality, liberty, and citizenship, the Fourteenth Amendment will undoubtedly remain at the center of those conversations. Understanding its basic facts is not just an academic exercise—it is essential for any citizen who wants to participate in the ongoing project of American constitutional democracy. For further reading on the amendment’s text and legislative history, see the Cornell Legal Information Institute’s annotation. In-depth case analyses are available through Oyez, and the National Archives provides the official text and history of all amendments. For a scholarly overview of incorporation, see the National Constitution Center’s Interactive Constitution.