Dred Scott v. Sandford, decided by the U.S. Supreme Court on March 6, 1857, held that people of African descent were not and could not be citizens of the United States, and that Congress had no constitutional power to prohibit slavery in federal territories.1National Archives. Dred Scott v. Sandford (1857) The 7–2 ruling struck down the Missouri Compromise of 1820, denied Scott any standing to sue in federal court, and is widely regarded as the worst decision the Court has ever issued.2Oyez. Dred Scott v. Sandford It was overturned by the Thirteenth and Fourteenth Amendments after the Civil War.
Who Dred Scott Was
Dred Scott was an enslaved man owned by Dr. John Emerson, a U.S. Army surgeon. During the 1830s, Emerson took Scott to Fort Armstrong in Illinois, a free state, and then to Fort Snelling in territory where the Missouri Compromise of 1820 barred slavery north of the 36°30′ line.3National Park Service. Dred Scott Chronology Scott lived at Fort Snelling for several years and married Harriet Robinson there. The couple had children.
After Emerson’s death, Scott returned to Missouri under the control of Emerson’s widow. In April 1846, he filed a petition in the St. Louis Circuit Court seeking his freedom, arguing that his extended residence in free jurisdictions had made him free.4National Park Service. Dred Scott Petition Transcript His claim tracked a Missouri doctrine nearly thirty years old: “once free, always free.” State courts had honored it for decades.5Missouri Digital Heritage. Missouri’s Dred Scott Case, 1846-1857 In 1852, with sectional tensions rising, the Missouri Supreme Court broke from its own precedent and ruled against Scott. The case moved into the federal system, where Scott, a Missouri resident, sued John Sanford of New York, and it reached the U.S. Supreme Court on that diversity-of-citizenship basis.
What the Supreme Court Held
Chief Justice Roger B. Taney wrote the majority opinion, and it did two big things.
No Citizenship, No Standing
Article III of the Constitution extends federal judicial power to disputes “between Citizens of different States.”6Congress.gov. ArtIII.S2.C1.16.3 Citizens of Different States and Diversity Jurisdiction Taney’s threshold question was whether a person of African descent could qualify as a “citizen” at all. His answer was no. The opinion declared that people of African descent, whether enslaved or free, were “not included, and were not intended to be included, under the word ‘citizens’ in the Constitution,” and were regarded at the founding as a “separate class of persons” with no political rights white Americans were bound to respect.7Legal Information Institute. Dred Scott v. Sandford Because Scott was not a citizen, he could not sue in federal court. The case could have ended there.
The Missouri Compromise Struck Down
It did not. The majority went on to address the merits and struck down the Missouri Compromise of 1820. Article IV, Section 3 of the Constitution gives Congress power to “make all needful Rules and Regulations” for federal territories.8Congress.gov. Article IV Section 3 Taney read that power narrowly, arguing it reached only lands the federal government held at ratification, not territories acquired later. Under that reading, Congress had no authority to ban slavery in the territory where Fort Snelling sat, and the Compromise was unconstitutional.9National Archives. Missouri Compromise It was only the second time in American history that the Court had invalidated a major act of Congress.
The majority also drew on the Fifth Amendment, which bars the federal government from depriving any person of “life, liberty, or property, without due process of law.”10Legal Information Institute. Fifth Amendment In the Court’s view, enslaved people were property, and a federal law that freed them the moment their owner crossed a territorial line was an unconstitutional taking. The reasoning turned due process into a protection for slaveholders that traveled with them into any part of the country.
The Dissents
Justices Benjamin Robbins Curtis and John McLean each filed dissents.2Oyez. Dred Scott v. Sandford
Curtis dismantled Taney’s history. Free Black men, he showed, were recognized as citizens at the time of ratification in at least five states: New Hampshire, Massachusetts, New York, New Jersey, and North Carolina. In several of those states, they could vote on the same terms as white citizens. Curtis also pointed out that during the drafting of the Articles of Confederation in 1778, a proposal to insert the word “white” before “inhabitants” had been put to a vote and rejected, with eight states voting against it.11Justia Law. Dred Scott v. Sandford, 60 U.S. 393 (1856) Taney’s premise that the founders universally excluded people of African descent from citizenship did not match the record. Curtis further argued that if the Court really lacked jurisdiction, it had no business ruling on the Missouri Compromise. He resigned from the Court shortly after the decision.
McLean focused on precedent. For nearly thirty years before Missouri’s 1852 reversal, the settled rule had been that an army officer who took an enslaved person into free territory freed that person as effectively as by signing emancipation papers. He saw the majority’s deference to Missouri’s recent reversal as capitulation to political pressure rather than sound law.
Political Fallout and the Road to War
The ruling landed in an already volatile country. Opponents of slavery read it as proof that the Court had been captured by pro-slavery interests: if Congress could not restrict slavery in the territories, and if Black Americans could never be citizens, the legal scaffolding holding the Union together was giving way.
The Republican Party, founded a few years earlier around opposition to slavery’s expansion, made the decision a rallying point. Its 1860 platform denounced “the new dogma that the Constitution, of its own force, carries slavery into any or all of the territories of the United States,” and declared that “the normal condition of all the territory of the United States is that of freedom.”12Britannica. How the Dred Scott Decision Affected the U.S. Election of 1860 Abraham Lincoln’s election that November set the stage for secession. The National Archives puts it plainly: the decision “moved the nation a step closer to the Civil War.”1National Archives. Dred Scott v. Sandford (1857)
What Happened to Dred Scott
Scott never gained anything from the case that carried his name through the courts. He did, however, gain his freedom by other means. Shortly after the decision, Irene Emerson, who had since remarried and become Mrs. Calvin Chaffee, transferred the Scott family back to the Blow family, the original owners who had helped fund the lawsuit. The Blows freed Dred Scott, Harriet, and their two daughters in May 1857, two months after the ruling.13National Museum of African American History and Culture. The Human Factor of History: Dred Scott and Roger B. Taney Scott lived as a free man for roughly a year before dying of tuberculosis in September 1858.
How the Ruling Was Overturned
The Civil War settled by force what the Court had tried to settle by law. The Reconstruction Amendments then dismantled the ruling’s legal foundations.
The Thirteenth Amendment, ratified on December 6, 1865, abolished slavery throughout the country: “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.”14National Archives. 13th Amendment to the U.S. Constitution: Abolition of Slavery (1865) Once the law no longer recognized people as property, the Fifth Amendment analysis that had shielded slaveholders collapsed with it.
The Fourteenth Amendment, ratified in 1868, aimed directly at the citizenship holding. Section 1 opens: “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.”15Congress.gov. Fourteenth Amendment The citizenship clause was written specifically to repeal Dred Scott.16National Museum of African American History and Culture. Reconstructing Citizenship Birthright citizenship became a constitutional fact rather than a matter of judicial interpretation about the framers’ racial attitudes, and every word Taney had written on who the founders intended to include lost its legal force.