The Dred Scott Supreme Court case, decided on March 6, 1857, produced one of the most condemned rulings in American legal history. By a 7–2 vote in Dred Scott v. Sandford, the Court held that people of African descent could not be citizens of the United States and struck down the Missouri Compromise, the 1820 law that had banned slavery across large portions of the western territories. Rather than settling the national fight over slavery, the decision inflamed it and pushed the country toward civil war. It was later dismantled by the Thirteenth and Fourteenth Amendments.
Who Dred Scott Was and How the Lawsuit Started
Dred Scott was an enslaved man purchased in St. Louis by Dr. John Emerson, a U.S. Army surgeon. As Emerson moved between military assignments, he brought Scott with him. Scott’s later petition described being taken to Rock Island in Illinois for roughly two and a half years, then to Fort Snelling in what is now Minnesota for about five years. Both locations prohibited slavery: Illinois by its state constitution, and Fort Snelling under federal law governing the northern Louisiana Purchase territories.1National Park Service. The Dred Scott Case Scott married Harriet Robinson at Fort Snelling, and the couple had children born on free soil.
After Emerson died in 1843, ownership of the Scott family passed to his widow, Irene Emerson. On April 6, 1846, Dred and Harriet Scott filed suit against Irene Emerson in the St. Louis Circuit Court, seeking their freedom.2National Archives. Dred Scott v. Sandford (1857) Their argument rested on a principle Missouri courts had long recognized: an enslaver who voluntarily brought an enslaved person into a jurisdiction that prohibited slavery forfeited any claim to hold that person in bondage afterward. What began as a state-court petition became an eleven-year battle that eventually reached the U.S. Supreme Court through the federal diversity jurisdiction of Emerson’s brother, John Sanford of New York, whose name a clerk misspelled as “Sandford” in the case caption.
What the Supreme Court Ruled in 1857
Chief Justice Roger Taney wrote the majority opinion, and every justice in the seven-member majority filed a separate concurrence.3Justia. Dred Scott v. Sandford The ruling had two central holdings, either of which alone would have been momentous.
Black People Could Not Be U.S. Citizens
The first question Taney addressed was whether Scott had the right to sue in federal court at all. His answer was no. Taney concluded that people of African descent, whether enslaved or free, were not “citizens” within the meaning of the Constitution. Because federal courts could only hear cases between citizens of different states, Scott had no standing to bring his lawsuit.3Justia. Dred Scott v. Sandford
Taney’s reasoning leaned on what he described as the original understanding of the framers. He argued that when the Constitution was drafted, people of African ancestry were viewed as a subordinate class with no rights that white citizens were bound to respect. He acknowledged that individual states might grant state-level rights to free Black residents, but insisted that state citizenship did not translate into national citizenship. Under this framework, even free Black men and women who had never been enslaved were shut out of federal courts.
Congress Could Not Ban Slavery in the Territories
Having concluded that Scott could not sue in federal court, Taney could have stopped. He did not. The majority went on to consider whether Congress had the power to prohibit slavery in federal territories, taking direct aim at the Missouri Compromise of 1820. That law had drawn a line across the Louisiana Purchase at the 36°30′ parallel, banning slavery north of it.1National Park Service. The Dred Scott Case
Taney argued that the Fifth Amendment protected property rights against arbitrary government interference, and that enslaved people were legally classified as property under federal law. Any act of Congress that stripped a citizen of property simply because that citizen brought it into a particular territory violated the Due Process Clause. Under this logic, Congress lacked the constitutional power to ban slavery in any federal territory.4Constitution Center. Dred Scott v. Sandford
The decision invalidated the Missouri Compromise. It was only the second time in American history that the Supreme Court had struck down an act of Congress, the first being Marbury v. Madison in 1803.5Federal Judicial Center. Marbury v. Madison (1803) The practical effect was sweeping: Congress had lost its ability to limit slavery’s expansion through legislation, and the federal government now had a constitutional duty to protect slaveholders’ property rights in every U.S. territory.
The Dissents
Justices Benjamin Curtis and John McLean rejected both holdings. Curtis attacked the citizenship question with evidence Taney had glossed over. At the time the Constitution was ratified, free Black men were citizens of at least five states — New Hampshire, Massachusetts, New York, New Jersey, and North Carolina — and in several of those states they held voting rights and had participated in ratifying the Constitution itself. Curtis found it illogical to claim the Constitution excluded people who had helped bring it into existence.3Justia. Dred Scott v. Sandford
McLean made a similar point about voting rights and argued that the Missouri Compromise was a valid exercise of congressional power. Both dissenters flagged a basic contradiction in the majority’s approach: if the Court truly lacked jurisdiction because Scott was not a citizen, it had no authority to rule on the merits. By declaring the Missouri Compromise unconstitutional after concluding it could not hear the case, the majority reached far beyond what the dispute required.3Justia. Dred Scott v. Sandford
What Happened to Dred Scott
The Court ordered the case dismissed for lack of jurisdiction and directed the lower federal court to vacate its earlier judgment. The Missouri state ruling against Scott stood, and he remained legally enslaved.
The legal system failed him, but the people around him did not. In May 1857, two months after the ruling, the Blow family, who had originally sold Scott to Dr. Emerson years earlier and had supported his legal fight, arranged for the transfer of the Scott family and granted Dred, Harriet, and their daughters their freedom through manumission papers filed in St. Louis. Scott lived as a free man for roughly eighteen months. He died of tuberculosis on September 17, 1858, and was buried in an unmarked grave at the old Wesleyan Cemetery in St. Louis.
Political Consequences
The decision did the opposite of what its authors intended. Northerners who had accepted compromise saw the ruling as proof that the slaveholding South controlled the federal government, including its highest court. Seven of the nine justices had been appointed by pro-slavery presidents, and five of the seven in the majority were from slave states.
The Republican Party, barely two years old when the case was decided, grew rapidly. The ruling technically invalidated the party’s core platform of preventing slavery’s expansion into the territories, but that only drew more supporters. Radical abolitionists who had avoided electoral politics, anti-slavery Democrats who felt betrayed by their party’s Southern wing, and Free-Soilers who saw their chances of settling the West disappearing all joined the coalition.
The ruling also split the Democratic Party. During the 1858 Senate debates in Illinois, Abraham Lincoln pressed Stephen Douglas on how the decision could coexist with Douglas’s “popular sovereignty” position that territorial residents should decide the slavery question themselves. Douglas’s answer, that residents could effectively exclude slavery by refusing to pass laws protecting it, satisfied some Northern voters but infuriated Southern Democrats, who demanded federal legislation to enforce Dred Scott. The split proved fatal in 1860, when the party fractured into Northern and Southern factions, clearing the path for Lincoln’s election. Within months, Southern states began seceding.
How the Decision Was Overturned
The Civil War and the constitutional amendments that followed dismantled every significant holding in Dred Scott. The Thirteenth Amendment, ratified in 1865, abolished slavery throughout the United States, destroying the foundation of Taney’s reasoning that enslaved people were constitutionally protected property.2National Archives. Dred Scott v. Sandford (1857)
The Fourteenth Amendment, ratified in 1868, was drafted with the explicit purpose of overturning the citizenship holding. Its opening line reads: “All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside.”6U.S. Congress. Fourteenth Amendment Where Taney had argued that citizenship was a privilege the framers intended to restrict by race, the Fourteenth Amendment made it a birthright available to everyone born on American soil. The amendment also barred states from denying any person due process or equal protection of the laws, turning the constitutional principle Taney had invoked to shield slaveholders into a guarantee of individual rights against government discrimination.
Legal scholars widely regard Dred Scott as the worst decision the Supreme Court ever issued. It remains a fixed reference point in constitutional law for how judicial power, exercised without restraint, can accelerate the very crisis it claims to resolve.