The Foundational Power: Judicial Review in Action

The Supreme Court of the United States holds a unique and powerful position within the federal government. Its authority to interpret the Constitution and strike down laws that violate it—known as judicial review—shapes nearly every facet of American life, from the rights we exercise to the policies that govern our economy and society. While the Constitution does not explicitly grant this power, the Court established it in the seminal 1803 case Marbury v. Madison. Chief Justice John Marshall’s opinion argued that it is “emphatically the province and duty of the judicial department to say what the law is.” This principle has made the Court a final arbiter on the meaning of the Constitution, ensuring that no law or executive action can contravene the nation’s founding document.

Judicial review is not merely a procedural mechanism; it is the engine through which the Court protects individual liberties, checks legislative and executive overreach, and adapts constitutional principles to evolving societal norms. The Court does not initiate cases on its own—it decides actual disputes brought before it. When it does, its rulings carry the weight of law nationwide, often altering the legal landscape overnight. For educators and the public, understanding this power is essential to grasping how the judiciary actively shapes the rights and responsibilities of every citizen.

Landmark Areas of Supreme Court Influence

The influence of the Supreme Court extends across all branches of government and into the daily lives of individuals. Below are key areas where its decisions have had profound and lasting impacts.

Civil Rights and Equality

The Court has been a central actor in the struggle for civil rights. In Brown v. Board of Education (1954), the Court unanimously declared that racial segregation in public schools violated the Equal Protection Clause of the Fourteenth Amendment. This decision overturned the “separate but equal” doctrine of Plessy v. Ferguson (1896) and served as a catalyst for the broader civil rights movement. Later rulings, such as Loving v. Virginia (1967), struck down laws banning interracial marriage, and Obergefell v. Hodges (2015) guaranteed the right to same-sex marriage under the Due Process and Equal Protection Clauses. These cases demonstrate the Court’s role in expanding the definition of equality and protecting marginalized groups from discriminatory laws.

Free Speech and Press

First Amendment jurisprudence has been heavily shaped by Supreme Court rulings. In New York Times Co. v. Sullivan (1964), the Court established a high bar for public officials to sue for defamation, protecting robust debate about government affairs. Similarly, Brandenburg v. Ohio (1969) held that inflammatory speech can only be restricted if it incites imminent lawless action. The Court has also addressed the boundaries of free speech in schools, campaign spending, and online platforms. For example, Citizens United v. FEC (2010) ruled that corporate funding of independent political broadcasts is protected speech, fundamentally altering campaign finance laws. These decisions illustrate the ongoing tension between protecting expression and regulating its effects on society.

Privacy and Reproductive Rights

The right to privacy, though not explicitly listed in the Constitution, has been a cornerstone of several major rulings. In Griswold v. Connecticut (1965), the Court struck down a law banning contraceptive use, citing a “penumbra” of privacy rights from the Bill of Rights. This reasoning undergirded Roe v. Wade (1973), which recognized a constitutional right to abortion. However, in Dobbs v. Jackson Women’s Health Organization (2022), the Court overturned Roe and Planned Parenthood v. Casey (1992), holding that the Constitution does not confer a right to abortion and returning the issue to the states. This shift highlights how the Court can both protect and withdraw rights, depending on its interpretation of the Constitution.

Healthcare, Commerce, and Economic Regulation

The Commerce Clause grants Congress the power to regulate interstate commerce, but the Court has often defined its limits. In National Federation of Independent Business v. Sebelius (2012), the Court upheld most of the Affordable Care Act’s individual mandate under Congress’s taxing power, while striking down a provision that threatened to withhold Medicaid funds from states. This ruling shaped healthcare access for millions. Earlier, Wickard v. Filburn (1942) expanded federal power over economic activity, allowing regulation of wheat grown for personal consumption because it indirectly affected interstate markets. These decisions show how the Court influences the balance between state and federal authority over the economy.

Case Studies of Judicial Review

Examining specific cases in depth reveals how judicial review operates and its real-world effects.

Marbury v. Madison (1803)

This case established judicial review and set the precedent for the Court’s role as a co-equal branch. William Marbury, a midnight appointee of President John Adams, sued Secretary of State James Madison for his commission. Chief Justice Marshall ruled that while Marbury was entitled to the commission, the Court could not enforce it because the law granting that power (the Judiciary Act of 1789) conflicted with the Constitution. By declaring a law unconstitutional, Marshall cemented the Court’s authority to interpret the Constitution, a power that has been used thousands of times since.

Brown v. Board of Education (1954)

This unanimous decision overturned the “separate but equal” doctrine, ruling that segregation in public schools was inherently unequal. The Court relied on sociological evidence showing that segregation harmed black children’s self-esteem and educational opportunities. The decision was a major victory for the civil rights movement but faced massive resistance. Subsequent cases, like Cooper v. Aaron (1958), affirmed that state officials could not ignore federal court orders enforcing desegregation.

Obergefell v. Hodges (2015)

In a 5–4 decision, the Court held that the right to marry is a fundamental right protected by the Due Process and Equal Protection Clauses, extending it to same-sex couples nationwide. Justice Kennedy’s opinion emphasized the dignity and autonomy of individuals to choose their life partners. This ruling invalidated same-sex marriage bans in over a dozen states and brought uniformity to marriage laws. It is a clear example of the Court using judicial review to enforce constitutional rights against popular majorities.

Citizens United v. FEC (2010)

This 5–4 ruling held that corporate funding of independent political broadcasts cannot be limited under the First Amendment because spending money is a form of speech. The decision struck down parts of the Bipartisan Campaign Reform Act and led to the creation of super PACs, which can raise unlimited funds for independent expenditures. Critics argue it has allowed wealthy donors to influence elections, while supporters maintain it protects free speech. The case underscores the Court’s power to reshape political processes through constitutional interpretation.

The Doctrine of Stare Decisis and Precedent

The Court relies on the principle of stare decisis, meaning “to stand by things decided.” This doctrine promotes consistency, predictability, and respect for prior rulings. When a case raises a legal issue that has been addressed before, the Court generally follows that precedent. For example, the principles established in Miranda v. Arizona (1966)—requiring police to inform suspects of their rights—have been reaffirmed in dozens of subsequent cases. However, the Court can and does overrule its own precedents when they are deemed erroneous or unworkable. The overruling of Roe v. Wade in 2022 demonstrates that stare decisis is not an absolute rule. The Court may overturn decisions if they are poorly reasoned, have proven harmful, or conflict with subsequent legal developments. This flexibility allows the Constitution to adapt, but it also introduces uncertainty into the law.

Public Perception and the Court’s Legitimacy

The Supreme Court’s power to make final, often divisive rulings relies on public acceptance and, ultimately, the willingness of the other branches to implement its decisions. Public perception is shaped by several factors.

Trust in the Judiciary

Gallup polls show that public confidence in the Supreme Court has fluctuated over time and often falls along partisan lines. In 2023, only about 40% of Americans expressed a great deal or quite a lot of confidence in the Court. Controversial decisions, such as Bush v. Gore (2000), which effectively decided the presidential election, and Dobbs v. Jackson Women’s Health, can erode trust, especially when decisions seem to reflect political ideology rather than neutral legal reasoning.

Activism vs. Restraint

A persistent debate surrounds whether justices should be “activists,” using judicial review to shape policy, or practice “restraint,” deferring to democratically elected branches. Critics of activism argue that the Court should not create new rights or invalidate laws based on loose constitutional interpretations. Defenders say that judicial review is necessary to protect minorities from majority tyranny. For instance, Korematsu v. United States (1944), which upheld Japanese internment, is widely condemned as an example of judicial deference leading to injustice. In contrast, Brown v. Board is praised as rightful activism.

Media Influence and Public Understanding

Media coverage plays a critical role in how the Court’s decisions are received. Headlines often simplify complex rulings, highlighting the outcome without explaining the legal reasoning. This can lead to misunderstandings about the scope of decisions. For example, the ruling in District of Columbia v. Heller (2008), which recognized an individual right to own firearms, was often portrayed as a total victory for gun rights advocates, but the opinion also emphasized that the right is not unlimited. Educators can help by fostering discussions that examine both the holding and the rationale of key cases.

The Confirmation Process and Public Scrutiny

Supreme Court nominations have become increasingly partisan and high-profile. The confirmations of Justices Brett Kavanaugh and Amy Coney Barrett were marked by intense public debate and allegations of political maneuvering. This heightened scrutiny affects public perception, with many viewing the Court as a political institution rather than a neutral arbiter of law. Understanding the confirmation process helps citizens appreciate the stakes involved in judicial appointments.

Conclusion: The Enduring Role of the Supreme Court

The Supreme Court’s power of judicial review is not a relic of the past but a living force that continues to shape American society. From protecting fundamental rights to defining the boundaries of government power, the Court’s decisions affect everything from the content of classroom lessons to the health care a person receives and the way elections are conducted. For educators, teaching about the Supreme Court is an opportunity to show students how abstract constitutional principles translate into concrete realities. By studying cases like Marbury v. Madison, Brown v. Board of Education, and Obergefell v. Hodges, learners can see how the Court resolves conflicts, protects individual liberties, and adapts the Constitution to new circumstances. The power of judicial review is both a safeguard and a responsibility—one that requires an informed citizenry to ensure that the Court remains a credible guardian of the rule of law.