Dred Scott v. Sandford, decided 7–2 in March 1857, is widely regarded as the worst decision the U.S. Supreme Court has ever handed down. Chief Justice Roger Taney’s majority opinion held three things: no person of African descent could be a citizen of the United States, Congress had no power to ban slavery in federal territories, and enslaved people were property protected by the Fifth Amendment. The ruling deepened the national crisis over slavery, and it was not undone until the Thirteenth and Fourteenth Amendments rewrote the Constitution after the Civil War.
Who Dred Scott Was and How the Case Reached the Court
Dred Scott was an enslaved man owned by Dr. John Emerson, an army surgeon. In 1834, Emerson took Scott from Missouri to Rock Island, Illinois, a free state, and kept him there until 1836. Emerson then moved him to Fort Snelling, in the territory north of the 36°30′ line where the Missouri Compromise of 1820 had banned slavery. Scott lived at Fort Snelling until 1838, when Emerson brought him and his wife Harriet back to Missouri.1National Archives. Dred Scott v. Sandford (1857)
In 1846, Dred and Harriet Scott sued for their freedom in St. Louis Circuit Court, arguing that years of residence in a free state and a free territory had ended their enslavement. Scott won at trial, lost on appeal to the Missouri Supreme Court, and then filed a new federal suit against John Sanford, who claimed ownership of the Scott family. A federal jury ruled against Scott in May 1854, and he appealed to the Supreme Court.1National Archives. Dred Scott v. Sandford (1857)
The Citizenship Holding
The first question was whether Scott could sue in federal court at all. Article III extends federal judicial power to disputes “between Citizens of different States,” so Scott had to qualify as a Missouri citizen suing a New York citizen.2Congress.gov. Article III Judicial Branch Taney answered with a sweeping declaration: no person of African descent, free or enslaved, had ever been or could ever become a citizen under the Constitution.
His reasoning leaned on what he characterized as the original understanding of the framers. He argued that when the Declaration of Independence proclaimed “all men are created equal,” the founders had not meant to include Black people, and he surveyed colonial-era laws restricting the rights of Black individuals as proof that the founding generation regarded people of African descent as “a subordinate and inferior class of beings” with no rights that white citizens were bound to respect.1National Archives. Dred Scott v. Sandford (1857)
Taney also held that state citizenship and federal citizenship were separate. Even if a state chose to recognize a free Black person as a citizen under its own laws, that recognition carried no weight in federal court. No state could unilaterally create federal citizens.3Justia U.S. Supreme Court Center. Dred Scott v. Sandford
Striking Down the Missouri Compromise
Having ruled that Scott could not sue, the Court could have stopped. Taney did not. He used the case to address the most explosive political question of the era: whether Congress could prohibit slavery in the territories. The Missouri Compromise of 1820 had drawn a line across the Louisiana Territory at 36°30′, banning slavery north of it except in Missouri itself.4National Archives. Missouri Compromise (1820) That was the law that should have made Fort Snelling free soil during Scott’s years there.
Taney struck it down. He read Article IV, Section 3, which gives Congress the “Power to dispose of and make all needful Rules and Regulations” for federal territory, as applying only to land the nation held when the Constitution was ratified.5Congress.gov. Article IV Section 3 Territory acquired later by purchase or treaty fell outside the grant. Under this reading, Congress had never had the authority to ban slavery from the Louisiana Territory.
The opinion cast the federal government’s role in the territories as that of a trustee acting on behalf of all the states. A trustee could not favor citizens from free states over citizens from slaveholding states by telling the latter they could not bring their recognized property into a common territory. The Court declared the Missouri Compromise unconstitutional, nullifying a statute that had governed territorial expansion for more than three decades.1National Archives. Dred Scott v. Sandford (1857)
Enslaved People as Fifth Amendment Property
The third holding turned enslaved people into constitutionally protected property. The Fifth Amendment provides that no person shall “be deprived of life, liberty, or property, without due process of law.”6Congress.gov. Constitution of the United States – Fifth Amendment Taney reasoned that because enslaved individuals were legally classified as property, any federal law that automatically freed them upon entering a territory amounted to seizing an owner’s assets without due process.
This was an early and aggressive use of what legal scholars call substantive due process, where a court examines the substance of a law rather than the fairness of the procedure. Taney argued that the Constitution “distinctly and expressly” affirmed the right of property in enslaved people, citing the Fugitive Slave Clause and the clause that had permitted the importation of enslaved people until 1808.1National Archives. Dred Scott v. Sandford (1857) A slaveholder’s financial interest in human beings became, in this framing, a vested constitutional right that no act of Congress could override.3Justia U.S. Supreme Court Center. Dred Scott v. Sandford
The practical effect was that residence in a free state or free territory no longer carried legal weight. An owner’s claim followed an enslaved person everywhere, and no legislature short of a constitutional amendment could say otherwise.
The Dissents
Two justices broke sharply from the majority. Justice Benjamin Curtis and Justice John McLean each wrote dissents that would prove more durable than Taney’s opinion.
Curtis on Citizenship
Curtis attacked Taney’s history. At the time the Constitution was ratified, free Black men were recognized as citizens in at least five states and voted in some of them.7Oyez. Benjamin R. Curtis If they were citizens of those states when the Constitution was adopted, Curtis argued, they were among the “We the People” who ordained it. He also rejected the wall Taney had built between state and federal citizenship: under the diversity jurisdiction clause, a citizen of one state could sue a citizen of another, and if a state recognized someone as a citizen, that recognition opened the federal courthouse door.
McLean on Congressional Power and Human Dignity
McLean focused on the territorial power question. Congress’s authority to “make all needful Rules and Regulations” for the territories was, he argued, a broad legislative power rather than the narrow custodial role Taney described. The Missouri Compromise had passed by an overwhelming vote and had been treated as constitutional for decades. McLean also challenged the premise that enslaved people were mere property. “A slave is not a mere chattel,” he wrote. “He bears the impress of his Maker, and is amenable to the laws of God and man; and he is destined to an endless existence.” Freedom, once obtained through residence in a free jurisdiction, could not be revoked.
The Final Judgment
The Court’s mandate ordered the lower circuit court to dismiss Scott’s suit for lack of jurisdiction. Because Scott was not a citizen, he had never been entitled to bring the case in federal court, and the years of litigation ended with a formal denial of his family’s freedom claim. The Court also assessed the costs of the lawsuit against Scott.1National Archives. Dred Scott v. Sandford (1857) Scott was freed by private arrangement shortly after the ruling and died of tuberculosis in September 1858.
How the Decision Was Overturned
The Civil War made Dred Scott a dead letter, and the Reconstruction Amendments wrote its reversal into the Constitution. The Thirteenth Amendment, ratified in 1865, abolished slavery and involuntary servitude throughout the United States, destroying the legal foundation of Taney’s property-rights analysis in a single sentence.8Congress.gov. U.S. Constitution – Thirteenth Amendment
The Fourteenth Amendment, ratified in 1868, was aimed squarely at the citizenship holding. Its opening line declares: “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.”9Congress.gov. Fourteenth Amendment The birthright citizenship clause erased the racial exclusion Taney had read into the original document. The amendment also guaranteed equal protection and due process to all persons, turning the Fifth Amendment argument Taney had used to protect slaveholders into a shield for the people he had tried to exclude.1National Archives. Dred Scott v. Sandford (1857)
Political Consequences
Taney likely hoped the decision would settle the slavery question. It did the opposite. The ruling enraged abolitionists and alarmed Northerners who had accepted the Missouri Compromise as a workable bargain. If Congress could not keep slavery out of any territory, the institution could spread everywhere.
The decision became a central issue in the 1858 Illinois Senate race between Abraham Lincoln and Stephen Douglas. During their debates, Lincoln pressed Douglas at Freeport on whether the people of a territory could lawfully exclude slavery before statehood. Douglas answered that they could, through unfriendly local legislation, but that answer put him at odds with Dred Scott and fractured his support in the South.10National Park Service. The Freeport Doctrine Lincoln lost the race but gained national attention, arguing that the nation could not permanently endure “half slave and half free” and that Dred Scott was part of a concerted effort to nationalize slavery. That visibility helped carry him to the Republican nomination in 1860, and his election that November triggered Southern secession and the Civil War.