A landmark case is one with a ruling (usually by the Supreme Court) that settles a significant legal question for the first time or changes how future cases are decided. These cases typically have a long-lasting and major impact on how the law works. Much like a geographical landmark, where a well-known, fixed point helps people find their way, landmark cases serve as a reference point for judges to return to again and again to help guide their decisions.
A case is typically considered a landmark when it sets a new legal precedent: a decision that must be followed in similar future cases. These decisions usually resolve a major question that was previously unsettled, often involving constitutional rights, government powers, or the relationship between federal and state law. The effects of these decisions typically reach far beyond the people involved in the case, often redefining laws and government policy. Landmark status can best be determined with the benefit of hindsight as cases may loom large when issued, but later deflate to nothingburger status.
Lower courts rely on landmark cases to control their decisions on related legal questions.
An example of a landmark case is Brown v. Board of Education (1954), in which the justices ruled that racially segregated public schools were unconstitutional, overturning the Court’s earlier doctrine of “separate but equal.” Another good example is Miranda v. Arizona (1966), in which the justices established that police officers must inform criminal suspects of certain rights (like the right to remain silent) before questioning them. From this ruling came the term “Miranda rights.”
Landmark cases stand out because they often alter the legal landscape. Most Supreme Court cases do not become landmarks; the majority apply existing law to certain disputes without changing much. Because they carry so much weight, landmark cases are often the center of public debate during and after the cases, sometimes for years.
