The Bill of Rights, comprising the first ten amendments to the United States Constitution, stands as the bedrock of American civil liberties. Ratified in 1791, it was designed to shield individual freedoms from the power of the federal government. Yet for nearly a century after its adoption, these protections did not apply to state governments. Citizens could look to the Constitution for relief from overreach by Washington, D.C., but state officials were free to restrict speech, conduct unreasonable searches, or deny fair trials without running afoul of the same constitutional guarantees. The dramatic expansion of civil rights that Americans now take for granted came through a gradual and often contentious legal process known as selective incorporation.

The Original Bill of Rights and Its Limited Scope

The framers of the Bill of Rights explicitly targeted the federal government. The very first words of the First Amendment begin: “Congress shall make no law…” This limitation was intentional. Many founders believed that state governments, being closer to the people, did not require the same restrictions. Moreover, several states already had their own bills of rights. However, this asymmetry created a patchwork of liberties. A person in New York might enjoy freedom of speech, while someone in Alabama could be jailed for expressing the same opinion. The problem grew more acute after the Civil War, when southern states enacted laws severely restricting the rights of newly freed African Americans.

The Fourteenth Amendment and the Birth of Incorporation

The ratification of the Fourteenth Amendment in 1868 marked the true turning point. Its Due Process Clause prohibits states from depriving any person of “life, liberty, or property, without due process of law.” For decades, the Supreme Court resisted interpreting this clause as a vehicle to apply the Bill of Rights to the states. In Slaughter-House Cases (1873), the Court effectively neutered the Privileges or Immunities Clause, which might have been a more straightforward path to nationalizing rights. Instead, attention shifted to the Due Process Clause. The question became: which liberties were so fundamental that they were “implicit in the concept of ordered liberty,” as Justice Cardozo later phrased it? This inquiry laid the foundation for selective incorporation.

Selective Incorporation vs. Total Incorporation

Two competing theories emerged. Total incorporation argued that the entire Bill of Rights should apply to the states wholesale. Justice Hugo Black championed this view, insisting that the Fourteenth Amendment’s framers intended precisely that outcome. His colleague Justice John Marshall Harlan II countered with selective incorporation, which advocated applying only those rights that were “fundamental” to a fair and just legal system. The Supreme Court ultimately sided with the selective approach, deciding each right on a case-by-case basis. This method allowed the Court to apply most, but not all, of the Bill of Rights to the states over the next century.

Key Supreme Court Cases in Selective Incorporation

The path of selective incorporation is best understood through the landmark decisions that extended specific protections. The following cases represent pivotal milestones.

Freedom of Speech: Gitlow v. New York (1925)

In Gitlow v. New York, the Supreme Court first suggested that the First Amendment’s free speech clause applied to the states through the Due Process Clause. Benjamin Gitlow was convicted under New York’s criminal anarchy law for distributing left-wing pamphlets. Though the Court upheld his conviction on the facts, it declared that “freedom of speech and of the press which are protected by the First Amendment from abridgment by Congress are among the fundamental personal rights and ‘liberties’ protected by the due process clause of the Fourteenth Amendment from impairment by the States.” This dictum opened the door for incorporation of other rights. Read the full Gitlow decision on Oyez.

Unreasonable Searches: Mapp v. Ohio (1961)

Before 1961, the Fourth Amendment’s protection against unreasonable searches and seizures applied only to the federal government. In Mapp v. Ohio, police entered Dollree Mapp’s home without a valid warrant and found obscene materials. The Supreme Court ruled that evidence obtained in violation of the Fourth Amendment could not be used in state court—the exclusionary rule—and incorporated the Fourth Amendment into the Due Process Clause. This forced state and local law enforcement to comply with the same warrant standards as federal agents. Read the Mapp decision on Oyez.

Right to Counsel: Gideon v. Wainwright (1963)

Clarence Earl Gideon was a poor Florida man charged with breaking into a poolroom. When he asked for a lawyer, the state court denied his request because Florida only provided counsel in capital cases. Gideon represented himself and was convicted. The Supreme Court unanimously overturned his conviction, holding that the Sixth Amendment’s right to counsel is a fundamental right essential to a fair trial and therefore applicable to the states. Gideon v. Wainwright transformed the criminal justice system, requiring states to provide attorneys for indigent defendants in felony cases. Read the Gideon decision on Oyez.

Self-Incrimination: Miranda v. Arizona (1966)

The iconic Miranda v. Arizona decision incorporated the Fifth Amendment’s protection against compelled self-incrimination to state proceedings. Ernesto Miranda was arrested for kidnapping and rape and confessed after two hours of police interrogation without being informed of his right to remain silent or to have an attorney present. The Supreme Court held that the Fifth Amendment requires law enforcement to advise suspects of these rights before custodial interrogation. The resulting Miranda warnings are now standard practice nationwide.

Right to Jury Trial: Duncan v. Louisiana (1968)

In Duncan v. Louisiana, the Court incorporated the Sixth Amendment’s right to a jury trial in serious criminal cases. Gary Duncan, a Black teenager, was convicted of assault by a Louisiana judge without a jury. The Court ruled that jury trials are fundamental to the American scheme of justice and required in state courts for offenses carrying potential sentences of more than six months in prison.

Second Amendment: McDonald v. Chicago (2010)

For decades, the Second Amendment’s right to keep and bear arms was understood to apply only to the federal government. In McDonald v. Chicago, the Supreme Court held that the Fourteenth Amendment incorporates the Second Amendment, thus requiring state and local governments to respect the individual right to self-defense. Chicago’s handgun ban was struck down, and the case reaffirmed the selective incorporation framework.

Which Rights Have Not Been Incorporated?

Even after more than a century of selective incorporation, not every provision of the Bill of Rights has been applied to the states. The Third Amendment (prohibiting quartering of soldiers) has never been incorporated in a Supreme Court case, largely because the issue rarely arises. The Fifth Amendment’s Grand Jury Clause has not been incorporated; states may use alternative methods to initiate prosecutions, such as preliminary hearings. The Seventh Amendment right to a civil jury trial has not been applied to state courts. The Eighth Amendment’s prohibition of excessive fines was incorporated in Timbs v. Indiana (2019), but the excessive bail clause remains unsettled. This selective approach leaves a small but notable gap between federal and state protections.

The Impact of Selective Incorporation on American Law

The gradual application of the Bill of Rights to the states has fundamentally reshaped American constitutional law. Uniform standards now govern the most critical aspects of criminal justice: searches, interrogations, right to counsel, and jury trials. Individuals facing prosecution in California or Texas enjoy the same core constitutional protections as those in federal court. This uniformity has strengthened the principle of equality before the law and reinforced the notion that citizenship entails a baseline of rights that no state may abridge.

Selective incorporation also promoted social change. The incorporation of the First Amendment’s establishment clause in Everson v. Board of Education (1947) paved the way for school prayer cases like Engel v. Vitale (1962). The incorporation of the Fourth Amendment’s exclusionary rule in Mapp gave criminal defendants a powerful tool against police misconduct. The cases that flowed from incorporation—from Gideon to Miranda to McDonald—continue to define the contours of modern liberty.

Criticisms and Debates

Selective incorporation has not been without its critics. Some constitutional originalists argue that the Fourteenth Amendment was never intended to apply the Bill of Rights to the states. They contend that the Supreme Court overstepped its authority, imposing federal values on state legal systems that once operated with greater independence. Others raise concerns about “judicial activism,” claiming that the Court essentially rewrote the Constitution by reading new requirements into the Due Process Clause.

On the other side, progressive voices note that selective incorporation has been incomplete and inconsistent. The Court has been more willing to incorporate rights related to criminal procedure than rights protecting economic liberty or property. Additionally, the case-by-case approach left some rights—like the right to civil jury trial—unincorporated, creating a two-tier system of justice. These debates continue to animate constitutional scholarship and occasional dissenting opinions from justices who favor a broader or narrower reading of the Fourteenth Amendment.

Conclusion

The selective incorporation of the Bill of Rights represents one of the most significant developments in American constitutional law. Through a series of bold Supreme Court decisions, the protections originally intended only to restrain the federal government have become a national floor of individual liberty. While the process has been gradual and occasionally contested, the result is a more uniform and robust protection of civil rights across all fifty states. Understanding this history is essential for any citizen who wants to grasp the full scope of the freedoms they hold—and the legal battles that secured them.

For further reading on the Due Process Clause and incorporation doctrine, consult the Cornell Legal Information Institute’s overview of incorporation or the Constitution Annotated.