Introduction: The Constitutional Safety Net for the Disempowered

The United States Constitution’s Bill of Rights was originally understood to limit only the federal government. State governments were left free to define the scope of individual liberties, a reality that left many Americans—especially members of marginalized groups—exposed to oppressive state laws. The doctrine of selective incorporation, rooted in the Fourteenth Amendment’s Due Process Clause, fundamentally changed this landscape. By requiring state governments to respect most of the rights enumerated in the Bill of Rights, selective incorporation has become a critical legal mechanism for protecting vulnerable populations against discrimination, abuse, and arbitrary state action.

Selective incorporation is not an automatic or wholesale application of the Bill of Rights to the states. Instead, it proceeds case by case, right by right, through the federal courts. This incremental process ensures that only those rights deemed “fundamental to a scheme of ordered liberty” are made binding on the states. For vulnerable populations—racial and ethnic minorities, women, LGBTQ+ individuals, people with disabilities, the poor, and religious minorities—selective incorporation has been the primary vehicle through which their basic civil liberties have been secured against state encroachment.

The Historical Foundation of Selective Incorporation

The journey of selective incorporation began with the Supreme Court’s decision in Barron v. Baltimore (1833), which held that the Bill of Rights applied only to the federal government, not to the states. That ruling stood for decades, even after the ratification of the Fourteenth Amendment in 1868, which contains the phrase “nor shall any State deprive any person of life, liberty, or property, without due process of law.” Early attempts to use the Fourteenth Amendment to apply the Bill of Rights to the states were rebuffed, such as in the Slaughter-House Cases (1873), where the Court sharply limited the scope of the Privileges or Immunities Clause.

The modern doctrine of selective incorporation emerged in the early twentieth century. In Gitlow v. New York (1925), the Supreme Court indicated that the First Amendment’s freedom of speech and press applied to the states through the Due Process Clause. This was a pivotal moment. Over the next several decades, the Court used a “fundamental rights” test to determine which provisions of the Bill of Rights were so essential to liberty that states must also honor them. As Justice Cardozo famously wrote in Palko v. Connecticut (1937), a right must be “implicit in the concept of ordered liberty” to be incorporated. This selective approach stood in contrast to Justice Hugo Black’s call for “total incorporation” of the entire Bill of Rights, a view the Court never adopted.

Through a steady stream of decisions—many of them arising from the injustices suffered by vulnerable groups—the Court has incorporated almost every provision of the Bill of Rights. Notable exceptions include the Third Amendment’s prohibition on quartering soldiers, the Fifth Amendment’s requirement for a grand jury indictment, and the Eighth Amendment’s prohibition on excessive bail. But the core protections—free speech, free exercise of religion, protection against unreasonable searches and seizures, the right to counsel, the right to confront witnesses, the privilege against self-incrimination, and protection against cruel and unusual punishment—now apply fully against state and local governments.

How Selective Incorporation Specifically Protects Vulnerable Populations

Vulnerable populations are those groups that have historically been excluded from full participation in civic life or subjected to systemic discrimination. Because state and local governments often enacted laws that directly harmed these groups, selective incorporation became an essential tool for challenging such laws in federal court. Below, we examine how the incorporation of specific rights has safeguarded several key vulnerable communities.

Racial and Ethnic Minorities

No group has benefited more from selective incorporation than racial minorities, particularly African Americans. The Reconstruction Amendments—Thirteenth, Fourteenth, and Fifteenth—were designed to dismantle the legal framework of slavery, but states in the South quickly erected a new system of segregation and disenfranchisement known as Jim Crow. For decades, the Supreme Court upheld state-mandated racial segregation under the “separate but equal” doctrine of Plessy v. Ferguson (1896). However, selective incorporation allowed the Court to eventually strike down segregationist laws as violations of fundamental rights.

The watershed case was Brown v. Board of Education (1954), which held that racial segregation in public schools violated the Equal Protection Clause of the Fourteenth Amendment. Although Brown was decided on equal protection rather than incorporation grounds, its logic rested on the idea that the right to non-discriminatory education was fundamental. Subsequent cases incorporated the First Amendment’s protections of speech and assembly to protect civil rights activists. Edwards v. South Carolina (1963) struck down the conviction of peaceful protestors on the state capitol steps, applying the First Amendment to the states. Loving v. Virginia (1967) incorporated the right to marry across racial lines, finding that Virginia’s anti-miscegenation law violated both the Due Process and Equal Protection Clauses.

The incorporation of the Fourth Amendment’s protection against unreasonable searches and seizures, applied in Mapp v. Ohio (1961), also had profound implications for minority communities. Police were now required to obtain warrants based on probable cause, reducing the ability to conduct racial profiling under the guise of state law enforcement. The exclusionary rule—barring illegally obtained evidence—gave minorities a meaningful remedy against abusive policing.

Women and Gender Minorities

Selective incorporation has also been instrumental in advancing the rights of women. Although the Equal Protection Clause of the Fourteenth Amendment was initially interpreted to allow sex-based discrimination, the incorporation of due process and privacy rights opened new avenues. In Reed v. Reed (1971), the Supreme Court for the first time struck down a state law that discriminated on the basis of sex, using the Equal Protection Clause. But it was the incorporation of the right to privacy—rooted in the First, Fourth, Fifth, and Ninth Amendments—that became the backbone of reproductive autonomy.

In Roe v. Wade (1973), the Court recognized that the constitutional right to privacy extended to a woman’s decision to terminate a pregnancy. While Roe has since been overturned, the underlying privacy doctrine was built on incorporation. More recently, Whole Woman’s Health v. Hellerstedt (2016) relied on the Fourteenth Amendment’s protection of liberty to strike down Texas abortion restrictions that imposed an undue burden on women seeking care. For women, the incorporation of privacy rights has been essential to protecting bodily autonomy from state interference.

For transgender individuals, selective incorporation has provided a foundation for challenging state laws that deny them equal treatment. In Obergefell v. Hodges (2015), the Supreme Court incorporated the right to same-sex marriage under the Due Process and Equal Protection Clauses. While the case primarily addressed sexual orientation, its reasoning—that the right to marry is a fundamental liberty—has been extended to protect transgender people in marriage and parenting. Additionally, the incorporation of the First Amendment’s freedom of speech has protected the right of transgender individuals to express their gender identity without state censorship.

LGBTQ+ Community

The incorporation of the right to intimate association and privacy was revolutionary for LGBTQ+ individuals. In Lawrence v. Texas (2003), the Supreme Court struck down a Texas law that criminalized consensual same-sex sodomy. Justice Kennedy, writing for the majority, held that the liberty protected by the Due Process Clause included the right of adults to engage in private sexual conduct without government intrusion. Lawrence effectively incorporated the right to sexual privacy, overturning Bowers v. Hardwick (1986) and transforming the legal landscape for LGBTQ+ people.

Building on Lawrence, the Court in Obergefell v. Hodges (2015) held that the right to marry was a fundamental liberty protected by the Due Process Clause and that states could not deny same-sex couples the right to marry. This decision incorporated marriage equality as a national constitutional right, overriding state laws that had banned same-sex marriage. The ruling had immediate benefits for LGBTQ+ families, including adoption rights, inheritance, spousal benefits, and hospital visitation. Without selective incorporation, the patchwork of state recognition would have left many same-sex couples without basic legal protections.

Furthermore, the incorporation of the First Amendment’s free speech and free exercise clauses has protected LGBTQ+ individuals from state censorship of their expression and from laws that would force them to hide their identities. The Court has repeatedly held that the state cannot compel individuals to speak in ways that disavow their identities, grounding this protection in the incorporated First Amendment.

People with Disabilities

While much of the modern disability rights framework is statutory (the Americans with Disabilities Act of 1990, the Rehabilitation Act of 1973), selective incorporation of certain constitutional provisions has provided an additional layer of protection. The Eighth Amendment’s prohibition on cruel and unusual punishment, incorporated in Robinson v. California (1962), was used to strike down a state law that made it a crime to “be addicted to the use of narcotics.” The Court reasoned that punishment for a mere status—such as addiction, which is often linked to disability—violated the Eighth Amendment. This principle has been extended to protect people with mental illness from being criminally punished for their condition.

The Due Process Clause has also been used to require states to provide appropriate care to involuntarily committed individuals with disabilities. In Youngberg v. Romeo (1982), the Supreme Court held that a mentally disabled person committed to a state institution had a due process right to safe conditions, freedom from bodily restraint, and minimally adequate training. More recently, Olmstead v. L.C. (1999) interpreted the ADA to require states to provide community-based treatment rather than institutionalization when appropriate, but the Court also grounded its reasoning in the fundamental liberty interest recognized by the Due Process Clause.

The incorporation of the Fourth Amendment’s protection against unreasonable searches and seizures has also been important for people with disabilities, particularly in the context of involuntary commitment and guardianship proceedings. Courts have required that states follow rigorous procedural safeguards before depriving a person of physical liberty, ensuring that vulnerable individuals are not warehoused without due process.

Economically Disadvantaged Individuals

The poor have often been the most vulnerable to state overreach, especially in the criminal justice system. Selective incorporation has provided essential safeguards for indigent defendants. In Gideon v. Wainwright (1963), the Supreme Court held that the Sixth Amendment’s right to counsel applied to state criminal prosecutions, requiring states to provide an attorney to defendants who cannot afford one. This decision was revolutionary because it equalized the playing field between rich and poor in criminal proceedings. Similarly, Griffin v. Illinois (1956) held that states must provide free trial transcripts to indigent defendants appealing their convictions, incorporating the Due Process Clause’s guarantee of meaningful access to the courts.

The incorporation of the Eighth Amendment’s prohibition on excessive fines, applied in Timbs v. Indiana (2019), protects low-income individuals from having their property seized by the state through civil asset forfeiture in amounts disproportionate to the offense. This ruling checked the ability of state and local police to profit from seizing the assets of the poor. The Due Process Clause also requires states to provide a hearing before terminating welfare benefits (Goldberg v. Kelly, 1970), ensuring that the state cannot cut off subsistence assistance without a meaningful opportunity to be heard.

Religious Minorities and Immigrants

The Free Exercise Clause of the First Amendment, incorporated in Cantwell v. Connecticut (1940), protects religious minorities from state laws that target their beliefs or practices. Jehovah’s Witnesses, for example, were early beneficiaries when the Court struck down a state law requiring religious solicitors to obtain a permit, holding that the state could not condition the exercise of religion on a discretionary license. In Sherbert v. Verner (1963), the Court incorporated the free exercise right to require states to accommodate religious practices unless they had a compelling interest. While the standard was later modified in Employment Division v. Smith (1990), the core protection remains: the state cannot force individuals to violate their religious beliefs without a strong justification.

For immigrants, selective incorporation has been limited because the federal government retains broad plenary power over immigration. However, the Due Process Clause protects persons, not just citizens, within U.S. territory. In Plyler v. Doe (1982), the Supreme Court struck down a Texas law that denied free public education to undocumented immigrant children. The Court held that the state’s discrimination against these children violated the Equal Protection Clause, reasoning that the children were innocent of any immigration violation and that education was fundamental. More recently, in Zadvydas v. Davis (2001), the Court held that the Due Process Clause limits the indefinite detention of deportable noncitizens, requiring the government to release them if removal is not reasonably foreseeable. These cases illustrate that even noncitizens benefit from the incorporated protections of the Bill of Rights when state or federal action threatens their liberty.

The Limits of Selective Incorporation

Despite its power, selective incorporation is not a perfect shield. Not every provision of the Bill of Rights has been incorporated. The Fifth Amendment’s requirement for a grand jury indictment in federal cases does not apply to the states. The Third Amendment’s protection against quartering soldiers has never been incorporated, though it is rarely needed. More significantly, the Second Amendment’s right to keep and bear arms was only incorporated in McDonald v. Chicago (2010), and the scope of that right remains contested. Vulnerable populations living in states with restrictive regulations may find their Second Amendment rights protected, but they may also face increased risks of gun violence due to lack of federal restrictions.

Moreover, selective incorporation does not automatically prevent state discrimination. The Supreme Court’s standards of review vary. For racial classifications, the Court applies strict scrutiny, which is difficult for states to satisfy. But for classifications based on disability, age, or wealth, the Court often applies rational basis review, giving states considerable deference. This means that vulnerable groups not classified as “suspect” or “quasi-suspect” classes under the Equal Protection Clause may find it harder to challenge discriminatory state laws through incorporation alone.

Additionally, the protection of vulnerable populations depends on the willingness of federal courts to recognize new fundamental rights. In recent years, the Supreme Court has taken a more cautious approach to incorporation, refusing to create new categories of fundamental rights under the Due Process Clause. For example, the Court declined in Dobbs v. Jackson Women’s Health Organization (2022) to recognize a constitutional right to abortion, overturning Roe v. Wade and returning the issue to the states. This decision highlights that incorporation is not static—it can be reversed or limited by changes in judicial philosophy.

Conclusion: Selective Incorporation as a Living Guarantee

Selective incorporation remains one of the most important constitutional doctrines for protecting the rights of vulnerable populations. By making the vast majority of the Bill of Rights binding on state governments, it ensures that fundamental liberties—speech, press, religion, counsel, privacy, and due process—are not subject to the whims of state legislatures. The history of selective incorporation is a history of expanding liberty: from the early incorporation of free speech to protect political dissenters, to the incorporation of the right to counsel for the poor, to the recent incorporation of marriage equality for same-sex couples.

For anyone whose life or livelihood depends on the protection of a constitutional right, selective incorporation is the legal bridge between the promise of the Bill of Rights and the reality of state power. Vulnerable populations have been the primary beneficiaries of this bridge, using it to challenge segregation, discrimination, criminal punishment, and denial of basic services. As the nation continues to grapple with issues of inequality and injustice, selective incorporation will remain a vital tool for ensuring that no state can deny its people the fundamental rights that define American liberty.

External Resources: