Plessy v. Ferguson
The Court ruled that Louisiana's law mandating separate but equal railway carriages for white and Black passengers was constitutional, finding that legally required racial separation in public transportation did not violate the Fourteenth Amendment's guarantee of equal protection.
The decision established that states could compel racial separation in public life so long as the separate facilities were formally equal — a ruling that provided constitutional cover for Jim Crow segregation laws across the country and shaped American race relations for generations.
Why this is a landmark case
Plessy v. Ferguson supplied the constitutional foundation for racial segregation in America. Upholding a Louisiana law requiring 'equal but separate' railway cars for Black and white passengers, the Court held that laws separating the races did not violate the Equal Protection Clause so long as the facilities were nominally equal. The lone dissenter, Justice John Marshall Harlan, wrote the now-celebrated line that 'our Constitution is color-blind, and neither knows nor tolerates classes among citizens.'
The 'separate but equal' doctrine gave legal cover to the entire Jim Crow regime for nearly six decades, sanctioning segregation in schools, transportation, housing, and public life—facilities that were almost never equal in fact.
Plessy is a landmark both for the harm it enabled and for its repudiation. It was overruled in the public-education context by Brown v. Board of Education (1954), which held that separate is 'inherently unequal,' and Harlan's color-blind dissent became one of the most influential dissents in American law. Plessy stands as a defining example of how the Court can entrench, and later dismantle, systemic injustice.
The Case in Depth
What happened
Homer Plessy, a man who was seven-eighths white by ancestry but considered Black under Louisiana law, deliberately boarded a railway car reserved for white passengers on a Louisiana train. When ordered by the conductor to move to the car designated for Black passengers, he refused and was forcibly removed, arrested, and charged under a Louisiana law that required railway companies to provide "separate but equal" accommodations for white and Black riders.
The question before the Court
Did Louisiana's law requiring separate but equal railway cars for white and Black passengers violate the Constitution?
The Court's answer
No — the Court ruled that Louisiana's law requiring separate but equal railway cars did not violate the Fourteenth Amendment's guarantee of equal protection. The Court drew a firm distinction between political equality, which the Constitution protects, and social equality, which it said the Constitution does not compel states to enforce. Because both races received equal (if separate) accommodations, the Court deemed the law a reasonable exercise of state police power, grounded in established customs and traditions — the same reasoning that had already been accepted for racially separate schools.
The Court also dismissed the claim that the law violated the Thirteenth Amendment's ban on slavery, finding that requiring racial separation on a train bears no resemblance to the institution of bondage and forced servitude that amendment was designed to destroy. The Court acknowledged that one provision of the law — stripping passengers of the right to sue railroads for wrongful assignment — may have been unconstitutional, but said that question was not properly before it.
Curious how the Court got there? See the step-by-step legal reasoning →
How the Court got there
The legal reasoning, step by step
- The Court first addressed the Thirteenth Amendment, which abolished slavery and involuntary servitude. It dismissed this challenge quickly: a law requiring separate train cars does not create bondage, ownership of persons, or forced labor — the hallmarks of slavery — and so the amendment simply has no bearing on a racial separation rule.
- Turning to the Fourteenth Amendment, which guarantees equal protection of the laws, the Court drew a key distinction: the amendment enforces the absolute equality of the two races before the law, but it was never meant to abolish all distinctions based on color or to enforce social equality or the physical mixing of the races. States have long been recognized as having broad 'police power' — authority to regulate public health, safety, comfort, and order — and separation of races on trains falls within that power.
- The Court applied a 'reasonableness' standard: a state law survives constitutional challenge if it is a reasonable regulation enacted in good faith for the public good, not merely to oppress a particular class. The Court gave legislatures wide latitude in judging what is 'reasonable,' saying they may act in light of established customs, traditions, and public sentiment.
- Measured against this standard, Louisiana's separate-car law was deemed reasonable. The Court drew an analogy to racially separate public schools, which courts across the country — including in Massachusetts — had long upheld as a legitimate exercise of state power, and to anti-miscegenation laws similarly accepted as within the states' authority.
- The Court rejected Plessy's argument that being assigned to a separate car imposed a badge of inferiority on Black passengers, saying that if any stigma attached, it did so only because 'the colored race chooses to put that construction upon it' — not because of anything in the law itself. The Court said legislation cannot overcome racial differences rooted in physical reality, and that real social equality, if it comes, must arise from voluntary interaction, not legal compulsion.
Doctrinal impact
Cases affected by this decision
Reaffirms Louisville, New Orleans &c. Railway v. Mississippi (133 U.S. 587)
The Court relied on this earlier ruling upholding a nearly identical Mississippi separate-car law as controlling authority.
Distinguishes Strauder v. West Virginia (100 U.S. 303)
The Court said barring Black citizens from juries is unconstitutional, but that rule does not apply to railway separation.
Distinguishes Hall v. De Cuir (95 U.S. 485)
That ruling addressed interstate commerce; here only travel within Louisiana is involved, so it does not control.