Dred Scott v. Sandford, 60 U.S. (19 How.) 393 (1857), is among the most reviled decisions in U.S. constitutional history, frequently ranked as the Supreme Court's gravest self-inflicted wound. Chief Justice Roger B. Taney, writing for a 7–2 majority, ruled against Dred Scott, an enslaved man who sued for his freedom on the ground that his master had taken him to reside in Illinois, a free state, and the Wisconsin Territory, where the Missouri Compromise of 1820 had prohibited slavery. Taney's opinion advanced three sweeping holdings: that persons of African descent, whether enslaved or free, could never be "citizens" within the meaning of Article III and therefore lacked standing to sue in federal court; that the Missouri Compromise's ban on slavery north of the 36°30′ line was unconstitutional as a deprivation of property without due process under the Fifth Amendment; and that Scott's residence on free soil did not alter his status once he returned to Missouri.
The decision marked only the second time the Court invalidated a federal statute, following Marbury v. Madison (1803), and it deployed an early form of substantive due process to shield slaveholding as a constitutionally protected property right. Taney reasoned that the Constitution's framers regarded Black persons as "so far inferior that they had no rights which the white man was bound to respect," and that the Territories Clause (Article IV, Section 3) did not authorize Congress to bar slavery in territories acquired after the original states' cession. Justices Benjamin Curtis and John McLean dissented forcefully, Curtis demonstrating that free Black men had voted in several states at the time of ratification, thereby refuting Taney's historical claim of categorical non-citizenship.
Far from settling the sectional crisis, Dred Scott inflamed it. The ruling effectively nullified the doctrine of "popular sovereignty" championed by Stephen Douglas and energized the nascent Republican Party, whose platform opposed the extension of slavery. The decision is widely regarded as a precipitating cause of the American Civil War (1861–1865). Its citizenship holding was directly and deliberately overturned by the Fourteenth Amendment (ratified 1868), whose first sentence guarantees birthright citizenship to "all persons born or naturalized in the United States"; the Thirteenth Amendment (1865) had already abolished slavery itself. The case remains the canonical illustration of judicial overreach and is invoked in debates over countermajoritarian judicial power.
For the FSOT US History section, Dred Scott is essential as a turning point in the antebellum sectional conflict and as a case study in failed judicial intervention. Examiners typically test its three holdings, Taney's authorship, its relationship to the Missouri Compromise and the Kansas–Nebraska Act of 1854, and the Reconstruction Amendments that reversed it. Candidates should connect it to the broader arc from the Compromise of 1850 through Lincoln's election in 1860, and be prepared to contrast Taney's substantive due process with later Fourteenth Amendment jurisprudence. It frequently appears alongside Plessy v. Ferguson (1896) and Brown v. Board (1954) in questions on race and constitutional law.
Example
In March 1857, Chief Justice Roger B. Taney delivered the Supreme Court's opinion declaring Dred Scott a non-citizen, a ruling that helped propel Abraham Lincoln's Republican Party toward the 1860 presidential victory.
Frequently asked questions
First, that African Americans could not be U.S. citizens and lacked standing to sue in federal court. Second, that the Missouri Compromise of 1820 was unconstitutional under the Fifth Amendment's Due Process Clause. Third, that Scott's residence on free soil did not make him free upon return to Missouri.