Plessy v. Ferguson: The Ruling, Harlan’s Dissent, and Overturn

Plessy v. Ferguson was an 1896 U.S. Supreme Court decision that upheld racial segregation, ruling 7–1 that Louisiana could require Black and white passengers to ride in separate railroad cars so long as the accommodations were roughly equivalent.¹ The ruling produced the “separate but equal” doctrine, which gave constitutional cover to segregation laws across the South for nearly six decades until the Court reversed itself in Brown v. Board of Education in 1954.

The Law Being Challenged

In 1890, Louisiana passed the Separate Car Act. It required railroads operating within the state to provide separate passenger coaches for white and Black riders, demanded that the accommodations be “equal but separate,” and made it a crime for any passenger to sit in a coach assigned to the other race. Violators faced a fine of twenty-five dollars or up to twenty days in jail.¹

The statute was part of a wave of segregation laws passed across the South after Reconstruction collapsed. Black citizens in Louisiana saw it as a direct attack on the constitutional amendments passed after the Civil War, and railroad segregation was especially offensive because it touched daily life so visibly.

How the Case Reached the Supreme Court

The case did not happen by accident. In September 1891, eighteen Black and Creole professionals in New Orleans formed the Comité des Citoyens with a single goal: bring a test case that could reach the Supreme Court and strike down the Separate Car Act. They chose Homer Plessy, a shoemaker classified as Black under Louisiana law despite being seven-eighths Caucasian.² His appearance was the point; it made the arbitrariness of racial classification hard to miss.

On June 7, 1892, with the cooperation of the East Louisiana Railroad, Plessy bought a first-class ticket from New Orleans to Covington and took a seat in the whites-only car.³ When he refused to move, a private detective hired in advance by the committee arrested him. Judge John Howard Ferguson upheld the law in the Criminal District Court for the Parish of Orleans, the Louisiana Supreme Court affirmed, and the case moved on to Washington on a writ of error.¹

Plessy’s lawyers attacked the statute on two grounds. They argued it violated the Thirteenth Amendment’s ban on slavery by imposing a “badge of servitude” on Black citizens, and they argued it violated the Fourteenth Amendment’s guarantee of equal protection.² Their core point was simple: a law that separates people by race is discriminatory by design, no matter how similar the facilities look.

What the Court Decided

The Supreme Court issued its decision on May 18, 1896. Justice Henry Billings Brown wrote for a 7–1 majority; Justice David Brewer did not participate because of a death in his family.⁴

The majority brushed aside the Thirteenth Amendment argument, holding that a mere legal distinction between races did not amount to involuntary servitude. The Fourteenth Amendment analysis is where the decision left its mark. Justice Brown acknowledged that the amendment guaranteed legal equality, but he drew a sharp line between political equality, which the Constitution protected, and social equality, which he said it did not. If a Black passenger felt inferior because of a separation law, Brown wrote, that was a matter of perception rather than something the law itself imposed.²

From that reasoning came the “separate but equal” doctrine. States had broad police power to pass laws promoting public order, the Court held, and requiring racial separation in public spaces fell within that power as long as the separate facilities were roughly equivalent. Whether a particular segregation law was reasonable depended, in the majority’s view, on the customs and traditions of the community.

Justice Harlan’s Dissent

Justice John Marshall Harlan was the only dissenter, and his opinion reads as if written for a later generation. He said the Louisiana law was designed not to keep the races apart but to keep Black citizens out of white spaces, and that everyone knew it. He rejected the majority’s split between political and social equality, warning that if the state could separate people by race on a train, nothing stopped it from requiring separate sidewalks, courtrooms, or seating at public meetings.

His most famous line has become one of the most quoted passages in American constitutional law: “Our Constitution is color-blind, and neither knows nor tolerates classes among citizens. In respect of civil rights, all citizens are equal before the law.”² He called the separation of citizens on a public highway “a badge of servitude wholly inconsistent with the civil freedom and the equality before the law established by the Constitution,” and said the “thin disguise of ‘equal’ accommodations” would fool no one.⁵

Harlan compared the ruling directly to the Court’s most infamous prior decision: “In my opinion, the judgment this day rendered will, in time, prove to be quite as pernicious as the decision made by this tribunal in the Dred Scott Case.”⁵

What the Decision Unleashed

Southern legislatures took the ruling as a green light. Within a few years, segregation laws spread to schools, theaters, restaurants, hotels, hospitals, public parks, and cemeteries. States also used the political cover of the decision to disenfranchise Black voters through poll taxes, literacy tests, and grandfather clauses, hollowing out the political equality the Fourteenth and Fifteenth Amendments were meant to secure.

The Court itself extended the logic. In Cumming v. Richmond County Board of Education in 1899, it allowed a Georgia school board to close a Black high school for budgetary reasons while continuing to fund a white high school with the same tax dollars, refusing to intervene absent evidence of “bad faith.”⁶ In practice, “separate but equal” meant separate. The equal part was rarely enforced.

How Plessy Was Overturned

On May 17, 1954, a unanimous Supreme Court overturned the doctrine in Brown v. Board of Education. Chief Justice Earl Warren wrote that segregating children in public schools by race denied them the equal protection of the laws, and that separate educational facilities were “inherently unequal” even when the physical buildings and resources were comparable.⁷ The opinion named Plessy directly, declaring that its separate-but-equal doctrine “has no place in the field of public education.”⁸

Brown was limited by its terms to schools, but it destroyed the legal foundation on which every segregation law rested. A decade later, the Civil Rights Act of 1964 finished the work by statute, prohibiting discrimination in public accommodations such as hotels, restaurants, and theaters, and making employment discrimination illegal.⁹

The Posthumous Pardon

On January 5, 2022, Louisiana Governor John Bel Edwards posthumously pardoned Homer Plessy under a state law creating an expedited process for convictions stemming from segregation-era statutes. It was the first pardon issued under that law.¹⁰ Since 2005, New Orleans has also observed Homer A. Plessy Day on June 7, the anniversary of his arrest, honoring both Plessy and the members of the Comité des Citoyens who engineered the challenge. Harlan’s dissent, ignored in 1896, is now the accepted reading of the Constitution.

1
National Archives. Plessy v. Ferguson (1896)
2
Justia. Plessy v. Ferguson, 163 US 537 (1896)
3
National Park Service. Homer Plessy
4
Oyez. Plessy v. Ferguson
5
Law.Cornell.Edu. Plessy v. Ferguson, 163 US 537
6
Justia. Cumming v. Richmond County Board of Education, 175 US 528 (1899)
7
Justia. Brown v. Board of Education of Topeka, 347 US 483 (1954)
8
National Archives. Brown v. Board of Education
9
National Archives. Civil Rights Act (1964)
10
In Custodia Legis. The Posthumous Pardon of Homer Plessy