Key Supreme Court Decisions That Defined Selective Incorporation

The doctrine of selective incorporation stands as one of the most transformative developments in American constitutional law. It provides the legal mechanism through which the protections enshrined in the Bill of Rights are applied to state and local governments, not all at once, but case by case, via the Due Process Clause of the Fourteenth Amendment. Before selective incorporation, the Bill of Rights only limited the federal government, leaving states largely free to restrict individual liberties. Over the course of the twentieth century, the Supreme Court issued a series of landmark decisions that gradually extended these fundamental rights to every American, regardless of which state they lived in. Understanding these decisions is essential for grasping how constitutional rights are actually enforced today.

The Pre‑Incorporation Landscape: Why the Bill of Rights Did Not Apply to the States

For the first 130 years of the republic, the Bill of Rights was understood as a restraint solely on the federal government. The Supreme Court made this explicit in Barron v. Baltimore (1833), when Chief Justice John Marshall held that the first ten amendments “contain no expression indicating an intention to apply them to the state governments.” After the Civil War, the Fourteenth Amendment was adopted with a clause that forbids states from depriving “any person of life, liberty, or property, without due process of law.” The radical potential of this clause was initially nullified by the Slaughter‑House Cases (1873), which narrowly construed the Privileges or Immunities Clause, effectively leaving the job of incorporating rights to the Due Process Clause.

For decades the Court refused to apply Bill of Rights guarantees to the states. But by the early twentieth century, a new approach began to emerge—one that would look to the Due Process Clause to identify which fundamental liberties were “implicit in the concept of ordered liberty” and therefore binding on the states.

The First Breakthrough: Free Speech and the Start of Selective Incorporation

Gitlow v. New York (1925)

The turning point came with Gitlow v. New York. Benjamin Gitlow, a socialist, had been convicted under New York’s criminal anarchy law for publishing a manifesto advocating the overthrow of the government. The Supreme Court upheld his conviction on the merits—finding that the speech in question posed a sufficient threat to justify punishment—but in doing so, it announced a principle far more consequential than the outcome of the case. For the first time, the Court 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.”

Though Gitlow himself lost, the decision opened the door for future litigants to challenge state laws that violated First Amendment rights. It marked the formal beginning of selective incorporation—a process that would unfold case by case over the next several decades.

The Fundamental Fairness Test: Palko and the Search for “Ordered Liberty”

Palko v. Connecticut (1937)

In Palko v. Connecticut, the Court confronted whether the Fifth Amendment’s protection against double jeopardy applied to the states. Writing for the majority, Justice Benjamin Cardozo rejected the notion that the entire Bill of Rights should be incorporated wholesale. Instead, he introduced the “fundamental fairness” test: only those rights that are “implicit in the concept of ordered liberty” and “so rooted in the traditions and conscience of our people as to be ranked as fundamental” would be incorporated. Under this test, the Court held that double jeopardy was not a fundamental enough right to bind the states—a ruling that would later be reversed in Benton v. Maryland (1969). Palko’s lasting legacy is the analytical framework it established: selective incorporation, not total incorporation.

Justice Hugo Black, in a famous dissent, argued for “total incorporation”—the view that the Fourteenth Amendment’s Due Process Clause was intended to apply the entire Bill of Rights to the states. Black’s position never commanded a majority, but his forceful advocacy helped push the Court toward a broader understanding of which rights were fundamental.

Key Landmark Decisions That Built the Modern Incorporation Doctrine

Near v. Minnesota (1931) – Freedom of the Press

Six years after Gitlow, the Court incorporated the First Amendment’s press clause in Near v. Minnesota. The case struck down a state law that allowed prior restraint of “malicious, scandalous, and defamatory” newspapers. The Court held that freedom of the press from prior restraint was a fundamental liberty protected by the Due Process Clause. This decision gave states their first clear boundary against censorship.

DeJonge v. Oregon (1937) – Freedom of Assembly

In DeJonge v. Oregon, the Court incorporated the First Amendment’s right to peaceably assemble. The case involved a Communist Party meeting that was broken up by Oregon authorities. The Court unanimously ruled that the right of assembly is a fundamental liberty, and that states could not criminalize attendance at a peaceful political meeting.

Cantwell v. Connecticut (1940) – Free Exercise of Religion

Cantwell v. Connecticut incorporated the First Amendment’s free exercise clause. The case involved Jehovah’s Witnesses who were arrested for soliciting donations without a license and for playing a recording that criticized the Catholic Church. The Court held that the Due Process Clause protects the right to believe and to practice one’s religion, subject only to narrow restrictions for public safety and order.

Everson v. Board of Education (1947) – Establishment Clause

The establishment clause was incorporated in Everson v. Board of Education. In a 5‑4 decision, the Court upheld a New Jersey law that reimbursed parents for bus fares to parochial schools, but it also applied the establishment clause to the states for the first time. Justice Black’s opinion famously declared that “the First Amendment has erected a wall between church and state” and that “that wall must be kept high and impregnable.” Everson remains a foundational precedent for church‑state cases at the state level.

Mapp v. Ohio (1961) – Fourth Amendment and the Exclusionary Rule

Perhaps one of the most consequential incorporation decisions was Mapp v. Ohio. Dollree Mapp’s home was searched by police without a warrant, and she was convicted for possessing obscene materials. The Supreme Court reversed the conviction and ruled that the Fourth Amendment’s protection against unreasonable searches and seizures, together with the exclusionary rule (which bars the use of illegally obtained evidence), applies to state courts. Before Mapp, states could use evidence even if it was obtained unlawfully. After Mapp, the exclusionary rule became a nationwide standard for law enforcement.

Gideon v. Wainwright (1963) – Right to Counsel

Gideon v. Wainwright held that the Sixth Amendment’s guarantee of a lawyer for criminal defendants applies to state felony cases. Clarence Earl Gideon, a poor defendant in Florida, had been denied a court‑appointed attorney. The Court unanimously ruled that the right to counsel is “fundamental and essential to a fair trial” and therefore incorporated through the Due Process Clause. This decision led to the creation of public defender systems across the United States.

Miranda v. Arizona (1966) – Self‑Incrimination

The Fifth Amendment’s privilege against self‑incrimination was incorporated in Miranda v. Arizona, which also incorporated the Sixth Amendment’s right to counsel in the context of police interrogations. The Court required law enforcement to inform suspects of their rights—the now‑familiar Miranda warnings—before custodial interrogation. Although primarily a federal constitutional rule, it was applied to the states through incorporation and remains a bedrock of criminal procedure.

Continuing the Process: Incorporation of Later Amendments

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

The Sixth Amendment’s right to a jury trial in criminal cases was incorporated in Duncan v. Louisiana. The Court held that the right to trial by jury in serious criminal cases is fundamental and binding on the states. This decision prompted a major shift: states that had previously tried minor felonies without juries had to provide them.

In re Gault (1967) – Due Process for Juveniles

Though not a pure incorporation case in the traditional sense, In re Gault applied many Due Process Clause protections—including the right to counsel, the right against self‑incrimination, and the right to confront witnesses—to state juvenile delinquency proceedings. It demonstrated that the incorporation doctrine extended beyond the adult criminal system.

McDonald v. City of Chicago (2010) – The Second Amendment

For many years, the Second Amendment was not applied to the states. The Court changed that in McDonald v. City of Chicago, which incorporated the Second Amendment right to keep and bear arms for self‑defense. The plurality opinion relied on the Due Process Clause, holding that the right was “fundamental to our scheme of ordered liberty” and “deeply rooted in this Nation’s history and tradition.” McDonald ensured that state and local gun laws must respect the core holding of District of Columbia v. Heller (2008).

The Impact of Selective Incorporation: Uniformity and Federalism

Selective incorporation has produced a remarkable transformation in American federalism. Before the doctrine took hold, a citizen’s rights could vary dramatically from one state to the next. Today, the vast majority of the Bill of Rights protections are enforceable against state and local governments. The result is a more uniform floor of constitutional liberty across the country, while states remain free to grant broader protections if they choose.

The doctrine also balances judicial restraint with incremental change. By incorporating rights on a case‑by‑case basis, the Court can evaluate each right in its historical and practical context. The total incorporation approach advocated by Justice Black would have been simpler, but the Court has preferred the gradual, reasoned development that selective incorporation provides.

Several core principles have emerged from these decisions:

Fundamental rights are those “implicit in the concept of ordered liberty” and are applied to the states through the Due Process Clause.
Not all rights in the Bill of Rights have been incorporated. For example, the Third Amendment (quartering soldiers) and the Fifth Amendment’s grand jury indictment requirement have not been applied to the states.
Incorporation is selective, not total. Each right must be individually adjudicated before it binds the states.
The scope of a right when applied to the states may be the same as when applied to the federal government, but the Court sometimes adjusts the standard to accommodate state interests.

For students and practitioners of constitutional law, the line of incorporation cases offers a rich study of how the Supreme Court has navigated the tension between national uniformity and state autonomy. The decisions are not merely historical milestones; they remain the foundation for modern litigation over rights, from free speech to gun ownership.

Challenges and the Future of Selective Incorporation

While selective incorporation is now well‑established, questions remain. The Court has never adopted a clear metric for what makes a right “fundamental,” and critics argue that the standard can be manipulated to reach desired results. The rise of the “privileges or immunities” theory in Saenz v. Roe (1999) and the concurring opinions in McDonald suggest that some justices may be willing to reconsider whether the Due Process Clause is the proper vehicle for incorporation. Additionally, as technology and society evolve, new rights—such as digital privacy—may require the Court to revisit whether existing incorporated protections (like the Fourth Amendment) adequately cover modern threats to liberty.

In 2022, Dobbs v. Jackson Women’s Health Organization overturned Roe v. Wade and Planned Parenthood v. Casey, holding that the right to abortion was not deeply rooted in the nation’s history and thus not a fundamental liberty protected by the Due Process Clause. The decision underscores that selective incorporation is not a one‑way ratchet; the Court can decline to recognize a right as fundamental even if it had been previously protected. This has fueled debate about whether other previously recognized rights could be revisited under the same historical analysis.

Nonetheless, the core doctrine of selective incorporation remains firmly anchored in American jurisprudence. The landmark decisions described above continue to serve as the backbone of constitutional litigation. They ensure that the protections once reserved for those dealing with the federal government now shield every citizen from overreach by state and local authorities.