Dred Scott v. Sandford APUSH: Ruling, Dissents, and Impact

For APUSH, Dred Scott v. Sandford (1857) is the Supreme Court decision that denied U.S. citizenship to all people of African descent, struck down the Missouri Compromise, and declared enslaved people to be constitutionally protected property under the Fifth Amendment. Chief Justice Roger B. Taney’s majority opinion inflamed sectional tensions instead of resolving them, fueled the rise of the Republican Party, and pushed the country toward civil war. It was later reversed by the 13th and 14th Amendments.

Who Dred Scott Was and How the Case Started

Dred Scott was an enslaved man owned by Dr. John Emerson, an army surgeon. Between 1833 and 1843, Emerson took Scott to postings in Illinois and the Wisconsin Territory, both places where slavery was banned. At Fort Snelling in present-day Minnesota, Scott married Harriet Robinson, and the couple had two daughters.¹

After Emerson died, his widow Irene hired the Scott family out to other households and kept most of their wages. On April 6, 1846, Dred and Harriet Scott sued for their freedom.¹

Their argument relied on a long-standing Missouri doctrine sometimes called “once free, always free”: an enslaved person who had lived in free territory was permanently free, even after returning to a slave state. Missouri courts had applied that rule for decades.²

A Missouri jury ruled for Scott in 1850. The Missouri Supreme Court then reversed that decision, breaking with its own precedents as pro-slavery sentiment hardened in the state’s judiciary. The case moved into the federal system because John Sanford, who had assumed control over Scott, lived in New York, giving Scott’s attorneys a diversity-of-citizenship argument.³

The Three-Part Ruling APUSH Wants You to Know

Chief Justice Taney wrote the majority opinion, and it did three things.

1. No Black Person Could Be a U.S. Citizen

Taney held that people of African descent, whether enslaved or free, were not and could not be citizens of the United States under the Constitution. He wrote that at the time of the founding, Black people were “a separate class of persons” with “no rights which the white man was bound to respect.”⁴ Because Scott was not a citizen, he could not sue in federal court at all.

That holding alone should have ended the case. If the Court lacked jurisdiction, it had no authority to reach the other questions. Taney reached them anyway, which is why later observers called much of the opinion obiter dictum — reasoning not necessary to the outcome.

2. The Missouri Compromise Was Unconstitutional

The Missouri Compromise of 1820 had drawn a line at 36°30′ across the Louisiana Purchase, permitting slavery south of it and prohibiting it north. The law also paired Missouri’s admission as a slave state with Maine’s admission as a free state.⁵ The Kansas-Nebraska Act of 1854 had already declared the Compromise’s slavery restriction “inoperative and void,” replacing the geographic line with popular sovereignty.⁶

Taney went further, ruling that the Missouri Compromise had been unconstitutional from the start. The Constitution, he said, did not explicitly give Congress the power to prohibit slavery in federal territories. This was only the second time in U.S. history that the Supreme Court struck down a federal statute; the first was Marbury v. Madison in 1803.⁵

3. Enslaved People Were Constitutionally Protected Property

Taney treated enslaved people as property protected by the Fifth Amendment’s Due Process Clause. The government could not deprive a slaveholder of his property, he argued, simply because that property was brought into a particular territory. Any law that automatically freed an enslaved person on entering free territory amounted to an unconstitutional taking.

The implication terrified the North. If Congress could not exclude slavery from federal territories, the same logic could threaten free states’ ability to liberate enslaved people brought within their borders. Abraham Lincoln warned that the decision was “all that slavery now lacks of being alike lawful in all the States.”

The Curtis and McLean Dissents

Two justices dissented. Justice Benjamin Curtis of Massachusetts wrote the more detailed dissent, pointing out that Black men had voted in five states at the time of the founding, which contradicted Taney’s claim that the framers meant to exclude them from citizenship. Curtis also argued that the Court had no business ruling on the Missouri Compromise after concluding it lacked jurisdiction.³ Curtis resigned from the Court shortly after the decision.⁷

Justice John McLean of Ohio wrote the other dissent, arguing that many framers had expected slavery to disappear gradually and that “all slavery has its origin in power, and is against right.” He also noted that several states, including slave states, had recognized people of color as voting citizens.

Why the Decision Mattered: The Road to Civil War

The ruling was meant to settle the slavery question. It did the opposite. Northern opinion radicalized, and the young Republican Party used the decision as proof of a “slave power conspiracy” in which Southern slaveholders controlled the federal government and intended to spread slavery nationwide.

Lincoln made the argument most forcefully in his 1858 “House Divided” speech, describing the Kansas-Nebraska Act and the Dred Scott decision as interlocking pieces of “machinery” designed to nationalize slavery. He warned that the logical next step would be a Court ruling that no state could exclude slavery either.

The decision also fractured the Democratic Party. Stephen Douglas had built his career on popular sovereignty, but Taney’s property-rights reasoning implied that settlers could no more vote slavery out of a territory than Congress could legislate it out. Douglas’s attempt to salvage his position with the Freeport Doctrine, which claimed slavery could not survive without local protective laws, alienated Southern Democrats without winning back Northern voters. The split helped hand Lincoln the presidency in 1860, which triggered Southern secession.

For APUSH, the case belongs in the final sequence of sectional crises alongside the Kansas-Nebraska Act, Bleeding Kansas, and John Brown’s raid.

How the 13th and 14th Amendments Reversed the Ruling

The Civil War made Taney’s opinion politically obsolete, but the constitutional reversal came through two amendments. The 13th Amendment, ratified in 1865, abolished slavery and involuntary servitude, destroying the property-rights framework the decision was built on.⁸

The 14th Amendment, ratified in 1868, overturned the citizenship holding directly. Section 1 states: “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.”⁹ That language was written specifically to repeal Dred Scott.⁴

What Happened to Dred Scott

Scott himself never benefited from the political consequences of his case. Irene Emerson had remarried a Republican congressman from Massachusetts who was embarrassed to learn his wife still owned slaves. The Scott family was transferred to the Blow family, longtime friends of Scott’s in St. Louis, who freed Dred, Harriet, and their daughters in May 1857, two months after the ruling. Dred Scott died of tuberculosis in September of that year.¹⁰

1
National Park Service. The Dred Scott Case
2
Missouri Secretary of State. Before Dred Scott – Freedom Suits in Antebellum Missouri
3
Justia. Dred Scott v. Sandford, 60 U.S. 393 (1856)
4
National Museum of African American History and Culture. Reconstructing Citizenship
5
National Archives. Missouri Compromise (1820)
6
National Archives. Kansas-Nebraska Act (1854)
7
Supreme Court of the United States. Guardian of the Constitution – The Counter Example of Dred Scott
8
National Archives. 13th Amendment to the U.S. Constitution – Abolition of Slavery (1865)
9
Congress.gov. Fourteenth Amendment – Constitution Annotated
10
National Museum of African American History and Culture. The Human Factor of History – Dred Scott and Roger B. Taney