Cases on ExcellentWiki - Legal Encyclopedia

Marbury v. Madison (1803)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

Marbury v. Madison, 5 U.S. 137 (1803), is the foundational case in American constitutional law. It established the principle of judicial review — the power of the federal courts to declare legislative and executive acts unconstitutional. The case remains one of the most significant decisions in United States Supreme Court history, forming the bedrock of the judiciary’s role as a coequal branch of government.

Before Marbury, the Constitution did not explicitly grant the Supreme Court the power to invalidate laws. The case arose from the intersection of partisan politics, institutional rivalry, and constitutional ambiguity. Chief Justice John Marshall’s masterful opinion navigated these treacherous waters, simultaneously asserting judicial authority while avoiding a direct confrontation with the executive branch.

Brown v. Board of Education (1954)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

Brown v. Board of Education of Topeka, 347 U.S. 483 (1954), is a landmark Supreme Court decision that declared racial segregation in public schools unconstitutional. The unanimous ruling overturned the separate but equal doctrine established in Plessy v. Ferguson (1896) and catalyzed the civil rights movement. Brown is widely regarded as the most important Supreme Court decision of the twentieth century.

The case was the culmination of decades of legal strategy by the National Association for the Advancement of Colored People (NAACP), led by future Supreme Court Justice Thurgood Marshall. The NAACP’s litigation campaign challenged segregation in graduate and professional education before targeting elementary and secondary schools. Brown represented the decisive breakthrough in this long legal struggle.

Roe v. Wade (1973)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

Roe v. Wade, 410 U.S. 113 (1973), is a landmark Supreme Court decision that recognized a constitutional right to abortion under the Fourteenth Amendment’s Due Process Clause. The decision invalidated many state laws restricting abortion and established a framework for balancing the woman’s privacy right against state interests in protecting prenatal life and maternal health. Roe remained the controlling precedent on abortion for nearly fifty years until it was overruled in Dobbs v. Jackson Women’s Health Organization (2022).

Miranda v. Arizona (1966)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

Miranda v. Arizona, 384 U.S. 436 (1966), is a landmark Supreme Court decision requiring law enforcement to inform criminal suspects of their constitutional rights before custodial interrogation. The decision established the now-familiar Miranda warnings: the right to remain silent, the right to counsel, and the warning that anything said can be used against the suspect in court. Miranda is one of the most recognized Supreme Court decisions in American culture.

Citizens United v. FEC (2010)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

Citizens United v. Federal Election Commission, 558 U.S. 310 (2010), is a landmark Supreme Court decision that held that the First Amendment prohibits the government from restricting independent political expenditures by corporations, labor unions, and other associations. The decision invalidated key provisions of the Bipartisan Campaign Reform Act (McCain-Feingold Act) and transformed the landscape of American campaign finance.

The case addressed fundamental questions about the role of corporations in democratic elections and the constitutionality of limits on political spending. The decision divided the Court along ideological lines and generated enormous public controversy, with critics arguing that it opened the floodgates to corporate money in politics and supporters contending that it protected core First Amendment rights.

Gideon v. Wainwright (1963)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

Gideon v. Wainwright, 372 U.S. 335 (1963), is a landmark Supreme Court decision that guaranteed the right to counsel for indigent criminal defendants in state felony cases under the Sixth and Fourteenth Amendments. The decision overruled Betts v. Brady (1942) and transformed the American criminal justice system by requiring states to provide lawyers to defendants who cannot afford them.

The case is a powerful story of individual perseverance and constitutional change. Clarence Earl Gideon, a semiliterate man with a criminal record, challenged the fundamental fairness of a system that denied him legal representation simply because he could not afford a lawyer. His handwritten petition to the Supreme Court became one of the most important documents in American legal history.

McCulloch v. Maryland (1819)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

McCulloch v. Maryland, 17 U.S. 316 (1819), is a landmark Supreme Court decision that established two foundational principles of American constitutional law: Congress possesses implied powers beyond those expressly enumerated in the Constitution, and states cannot tax or interfere with legitimate federal operations. Chief Justice John Marshall’s opinion articulated a broad interpretation of federal power that continues to shape constitutional jurisprudence.

The case arose during a period of intense debate over the scope of federal authority. The First Bank of the United States had been allowed to expire in 1811, and the economic disruptions following the War of 1812 led Congress to charter the Second Bank of the United States in 1816. The bank was deeply unpopular in many states, which resented federal competition with state-chartered banks.

South Dakota v. Wayfair (2018)

Sun, 05 Jul 2026 00:00:00 +0000

Overview

South Dakota v. Wayfair, Inc., 585 U.S. 162 (2018), is a landmark Supreme Court decision that overruled the physical presence rule for state sales tax collection. The Court held that states may require out-of-state sellers to collect and remit sales tax even when the seller has no physical presence in the taxing state. The decision fundamentally changed the landscape of e-commerce taxation.

The case addressed a long-standing tension between constitutional doctrine and twenty-first-century economic realities. For decades, the physical presence rule had protected out-of-state sellers from sales tax collection obligations, but the rise of e-commerce had made the rule increasingly untenable, creating an uneven playing field between online and brick-and-mortar retailers.