The Dred Scott decision, handed down by the U.S. Supreme Court on March 6, 1857, held 7-2 that people of African descent could never be citizens of the United States and that Congress had no constitutional power to prohibit slavery in the federal territories.1National Archives. Dred Scott v. Sandford (1857) Chief Justice Roger Taney wrote the majority opinion in Dred Scott v. Sandford. The ruling inflamed the national crisis over slavery, helped push the country into civil war, and was directly repudiated by the Thirteenth and Fourteenth Amendments after the war ended. Legal scholars today widely regard it as the worst decision the Court has ever issued.
What the Court Held
The majority opinion did two things, either one of which would have been momentous on its own.
First, it ruled that Dred Scott could not sue in federal court because he was not, and could never be, a citizen. Taney extended that conclusion to every person of African descent in the country, enslaved or free.2National Museum of African American History and Culture. Reconstructing Citizenship
Second, it struck down the Missouri Compromise of 1820, holding that Congress lacked the constitutional power to ban slavery in the territories.3Justia. Dred Scott v. Sandford It was only the second time in American history the Supreme Court had struck down an act of Congress. The first was Marbury v. Madison in 1803.4Federal Judicial Center. Marbury v. Madison (1803)
How Dred Scott’s Case Reached the Supreme Court
Dred Scott was an enslaved man owned by Dr. John Emerson, a surgeon in the United States Army. In 1834, Emerson brought Scott from Missouri to Fort Armstrong in Illinois, a free state, and then to Fort Snelling in the Wisconsin Territory, where federal law prohibited slavery.1National Archives. Dred Scott v. Sandford (1857) Scott lived in these free jurisdictions for roughly four years. He married Harriet Robinson at Fort Snelling, and the couple had two daughters before the family was returned to Missouri in 1838.5Supreme Court. Dred Scott v. John F. A. Sandford
After Emerson died in 1843, the Scotts passed to his widow, Irene Emerson. In 1846, Dred and Harriet each filed petitions in St. Louis Circuit Court seeking their freedom. They relied on a long-standing Missouri rule: a person held in slavery who had resided in a free jurisdiction could claim permanent freedom upon returning to a slave state. A Missouri jury declared the family free in January 1850. In March 1852, the Missouri Supreme Court reversed by a 2-1 vote, breaking with decades of the state’s own precedent.6Missouri Secretary of State. Dred Scott Case, 1846-1857
The case then moved into federal court. Irene Emerson’s brother, John Sanford, lived in New York, so Scott could sue him under the diversity jurisdiction rules that let residents of different states litigate in federal court.3Justia. Dred Scott v. Sandford Sanford’s lawyers immediately argued that Scott, as a person of African descent, was not a citizen and could not invoke federal jurisdiction at all. That threshold question is what the Supreme Court took up in its 1856 term.
Taney’s Reasoning on Citizenship
Taney reached back to the founding era and concluded that people of African descent were not part of the “sovereign people” who created the Constitution. They had been “regarded as beings of an inferior order,” he wrote, and possessed “no rights which the white man was bound to respect.”2National Museum of African American History and Culture. Reconstructing Citizenship Because Scott was not a citizen, the court held he had no standing to sue in federal court, and the case should have been dismissed on that ground alone.5Supreme Court. Dred Scott v. John F. A. Sandford
Taney acknowledged that individual states could grant a form of local citizenship within their own borders, but insisted that state recognition carried no weight at the federal level. Under this reading, no person of African descent, enslaved or free, could ever hold national citizenship.
Striking Down the Missouri Compromise
Having decided the court had no jurisdiction, the majority could have stopped. It did not. Taney pressed on to the merits and declared the Missouri Compromise of 1820 unconstitutional.3Justia. Dred Scott v. Sandford
The Missouri Compromise had drawn a line along the 36°30′ parallel, banning slavery in territories north of that boundary while admitting Missouri as a slave state.7U.S. Senate. Missouri Compromise Ushers in New Era for the Senate For nearly four decades, that line had held the political conflict over slavery within manageable limits. Taney swept it away.
His reasoning turned on the Fifth Amendment’s guarantee that no person may be deprived of property without due process of law. The court treated enslaved people as constitutionally protected property and held that any federal law stripping an owner of that property because of a geographic line was unconstitutional.3Justia. Dred Scott v. Sandford Under this logic, slaveholders could bring enslaved people into any territory without losing their claimed ownership.
The Dissents
Justices Benjamin Robbins Curtis and John McLean each wrote forceful dissents. Curtis went straight at the citizenship question with evidence the majority had ignored. At the time the Constitution was ratified, free Black men in New Hampshire, Massachusetts, New York, New Jersey, and North Carolina were recognized as citizens and voted on equal terms with white citizens.5Supreme Court. Dred Scott v. John F. A. Sandford If people of African descent had helped create the constitutional order as voters, Taney’s claim of a blanket racial exclusion from citizenship could not stand.
McLean focused on Congress’s territorial authority. He argued that slavery was a creature of local law with no force in jurisdictions where it was prohibited, and that Congress had clear constitutional power to regulate slavery in areas not yet organized into states.
Consequences for the Country
Taney likely believed his opinion would settle the slavery question. It did the opposite. The decision horrified northerners, who read it as proof that a slaveholding faction controlled the federal government. Republicans had built their party on restricting slavery’s expansion into the territories, and the ruling invalidated that platform overnight. Rather than destroying the party, it radicalized and expanded it, drawing in abolitionists, anti-slavery Democrats, and Free-Soilers.
The decision became a central issue in the 1858 Senate debates between Abraham Lincoln and Stephen Douglas in Illinois. Lincoln opposed the ruling as a political rule binding on the nation, arguing that it laid “the foundation not merely of enlarging and spreading out what we consider an evil, but it lays the foundation for spreading that evil into the States themselves.” Douglas defended it as settled law. The debates elevated Lincoln’s national profile and positioned him for the 1860 presidential campaign.
Northerners feared the ruling’s logic could eventually make slavery legal throughout the entire country. If Congress could not restrict slavery in the territories, and enslaved people were constitutionally protected property everywhere, what would stop the court from ruling that free states could not ban slavery either? That fear accelerated sectional division and contributed to the collapse of political institutions that led to secession and the Civil War within four years.
How the Decision Was Overturned
The Civil War settled by force what Taney had tried to settle by judicial decree. In its aftermath, the country amended the Constitution to repudiate the ruling directly.
The Thirteenth Amendment, ratified in 1865, abolished slavery: “Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.”8Legal Information Institute. 13th Amendment, U.S. Constitution
Congress followed with the Civil Rights Act of 1866, which declared that “all persons born in the United States and not subject to any foreign power, excluding Indians not taxed, are hereby declared to be citizens of the United States” with full and equal rights “of every race and color, without regard to any previous condition of slavery.”9Constitution Center. Civil Rights Act of 1866
To ensure no future court could resurrect Taney’s reasoning, the Fourteenth Amendment embedded birthright citizenship directly into the Constitution in 1868: “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.” That language was specifically intended to overturn Dred Scott.2National Museum of African American History and Culture. Reconstructing Citizenship
What Happened to Dred Scott
The ruling left Dred Scott legally enslaved under federal law, but not for long. The sons of Peter Blow, the family that had originally owned Scott before selling him to Emerson, arranged to purchase the Scott family’s freedom. They persuaded Irene Emerson to transfer ownership back, and Henry Taylor Blow formally emancipated Dred Scott, Harriet, and their two daughters on May 26, 1857, less than three months after the ruling.1National Archives. Dred Scott v. Sandford (1857) Scott worked as a porter at a St. Louis hotel afterward. He died on September 17, 1858, roughly sixteen months later, having spent more than a decade fighting for a freedom he barely got to live in.