The Dred Scott decision denied African Americans citizenship, upheld slavery, and marked the first use of judicial review since Marbury v. Madison

The Dred Scott decision denied citizenship to people of African descent

In 1857, the Supreme Court ruled in Dred Scott v. Sandford that Black Americans could not be US citizens. The decision heightened an already brewing conflict and became a key factor in pushing the nation toward civil war.

The 14th Amendment aimed to guarantee citizenship for formerly enslaved people

The 14th Amendment was crafted to overturn Dred Scott by granting birthright citizenship to formerly enslaved people and their descendants, securing their legal status under federal law.

Marbury v. Madison established the Supreme Court's power of judicial review

The 1803 ruling empowered courts to strike down laws that violate the Constitution, permanently expanding the Supreme Court's authority and cementing its role as a coequal branch. This video explains the case and its lasting impact.

Explore the most impactful Supreme Court cases in US history

Browse by constitutional topic to explore key rulings, their historical impact, and the legal principles they established. Each case includes a summary of the decision, along with notable excerpts from majority and dissenting opinions.

Plessy v. Ferguson legalized segregation until Brown v. Board of Education overturned it

In 1896, the Supreme Court upheld racial segregation under the "separate but equal" doctrine, enabling decades of discrimination. This explainer traces how Brown later ruled school segregation unconstitutional and reshaped civil rights law.

John Marshall owned enslaved people and ruled against them in slavery cases

Though Marshall wrote that slavery was "contrary to the law of nature," he enslaved nearly 200 people at his death in 1835 and ruled against enslaved claimants in several cases. His will offered conditional emancipation to Robin Spurlock, his first slave.

Read SCOTUSblog for daily, nonpartisan coverage of the US Supreme Court

Founded in 2002, SCOTUSblog offers expert analysis from lawyers, professors, and journalists. The blog provides transparent, unbiased explanations of significant cases, real-time updates on decisions, and insights into court nominations and trends.

Francis Scott Key was a slaveholder and anti-abolitionist

As a Christian, Key was opposed to slavery in principle, though he owned slaves and was opposed to abolition. His anti-slavery work was limited to the American Colonization Society, which believed slaves should be freed and then returned to Africa, despite Black Americans opposing the idea. Later, he turned into an anti-slavery activist.

Black Americans were systematically excluded from juries for much of US history

Literacy tests, poll taxes, and even explicit laws kept Black Americans off juries until well into the 20th century. The Jury Selection and Service Act of 1968 mandated that federal juries reflect a fair cross-section of the community, though racial disparities in jury selection persist.

Listen to firsthand accounts of how Black Americans fought to end slavery and shape Reconstruction

This podcast explores the actions of Black Americans who fought for freedom before, during, and after the Civil War—highlighting their key role in abolition and the Reconstruction era.

Hear about the Supreme Court case so divisive that it caused a justice's breakdown

This podcast episode examines Baker v. Carr, a landmark redistricting ruling that Earl Warren called the most important of his tenure. The case was so divisive it triggered a justice's breakdown and permanently reshaped American democracy.

Reynolds v. United States (1878) established that religious belief is not a defense for a crime

In the first major Supreme Court case on the free exercise clause, the court ruled that the government cannot regulate religious belief, but it can regulate religious practice if it violates the law. The case arose from a Mormon man convicted of polygamy who argued his faith required it.

Experts believe a Supreme Court ruling on birthright citizenship is likely in 2026

In September 2025, the Trump administration asked the Supreme Court to review lower court rulings striking down its executive order on birthright citizenship. If the court takes the case, a decision is expected by mid-2026.

The early DOJ led the first major federal civil rights prosecutions

During Reconstruction, the newly formed Department of Justice prosecuted Ku Klux Klan violence in the South—securing over 1,000 indictments and more than 500 convictions by 1873 in defense of newly established civil rights protections.

Slavery in the US: a timeline

In 1619, a ship with 20 captives landed at Point Comfort in Virginia, ushering in the era of American slavery. Scroll through this timeline to learn more about slavery in the US and its long lasting effects.

Southern Black Codes sought to preserve prewar racial labor structures

With little federal oversight, Southern states enacted laws effectively reestablishing slavery's economic and social order. These laws, known as the "Black Codes," restricted freed people's movement, labor, and property rights.

Thousands of state voting changes have been federally blocked since the Voting Rights Act

Since 1965, federal oversight has blocked thousands of state-level voting changes—including redistricting plans—by requiring approval for measures that could affect minority representation, a process scaled back by the Supreme Court in 2013.

One of the earliest Memorial Day ceremonies was held by newly freed Black Americans in South Carolina

On May 1, 1865, roughly 10,000 people, mostly freed slaves, paraded around a Charleston racetrack where Union prisoners had been buried, predating the first national commemoration at Arlington National Cemetery by three years.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

The nullification crisis tested whether states could defy federal law

In the 1830s, South Carolina declared federal tariffs void within its borders. President Andrew Jackson threatened military force, Congress passed a compromise tariff, and the episode ended with federal authority prevailing over state nullification.

In the midst of the Civil War, Lincoln rapidly expanded presidential power

Abraham Lincoln suspended habeas corpus, expanded the army without congressional approval, and issued the Emancipation Proclamation—despite likely lacking authority to unilaterally alter national slave law. His actions set precedents for expanded presidential power in wartime.

The Chinese Exclusion Act was America's first major immigration restriction

The act, signed in 1882, barred Chinese laborers from entering the United States, marking the first significant restriction on free immigration. This overview examines 19th-century Chinese immigration, rising anti-Chinese sentiment, and the diplomatic implications of exclusionary legislation.

A section condemning slavery was cut from the Declaration

Thomas Jefferson included a passage in his original draft denouncing slavery. This explainer from the Henry Ford Museum explores why Congress removed it to preserve colonial unity and how that decision shaped the nation's earliest political compromises.

Not all speech in the United States is protected

This page explains the categories of speech—including defamation, incitement, true threats, fraud, and obscenity—the Supreme Court has placed outside First Amendment protection and how courts determine which standard to apply when speech is challenged.

Franklin D. Roosevelt's 1937 court-packing plan sought to expand the Supreme Court—and failed

Frustrated by Supreme Court rulings against the New Deal, Franklin D. Roosevelt proposed expanding the court in 1937. The failed plan triggered fierce backlash and is regarded as the last serious presidential attempt to alter the court's size for ideological ends.

How a Cleveland woman who slammed the door on police changed the Fourth Amendment

In 1957, a bomb exploded under the front porch of boxing promoter Don King in Cleveland. When police received a tip to search Dollree Mapp's home, she refused to let them in. Her case went to the Supreme Court, resulting in a ruling that barred illegally obtained evidence from state criminal trials.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

Watch a 1934 short film starring jazz legend Cab Calloway, a major figure in the Harlem Renaissance's music scene

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

The American cockroach is actually from Africa, an apparent hitchhiker aboard ships carrying enslaved people, with evidence suggesting the bug may have arrived in the New World as early as the 1600s.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

The first line of 'immortal' human cells, which can divide indefinitely and are used in scientific research, was nonconsensually taken from a Black woman.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

The Brothers Grimm were lawyers before they were storytellers, and became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

View the ten deadliest tornadoes in US history.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

Legendary architect Frank Lloyd Wright designed the SC Johnson headquarters in Wisconsin, aiming to make a cathedral-like workplace

Learn how to read a prospectus, the juicy document that any company must file with the SEC before going public.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.

The Great Salt Lake's distinct dual coloration results from high-salinity organisms that only live in the northern portion and produce a purple protein.

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'