The landmark Supreme Court case Plessy v. Ferguson is widely remembered for establishing the infamous doctrine of separate but equal, but few realize that the lawsuit was a meticulously staged civil rights test case. In 1890, Louisiana passed the Separate Car Act, requiring segregated accommodations on passenger railways.
In response, a mixed-race activist group called the Citizens' Committee to Test the Constitutionality of the Separate Car Act formed in New Orleans to overturn the law. They specifically selected Homer Plessy to be arrested. Plessy was an octoroon—meaning he had seven white great-grandparents and one Black great-grandparent—and was legally classified as Black under Louisiana law despite being visually indistinguishable from a white man.
This was a crucial legal strategy: the committee hired a private detective to arrest Plessy only after he explicitly informed the conductor of his African ancestry, as no one would have otherwise suspected it. Defense lawyer Albion Tourgée argued that racial identity was a form of property and that the state had no objective, scientific, or constitutional authority to define race or deprive a citizen of their reputation as a white person based on arbitrary blood fractions. Although the Supreme Court rejected these arguments in a disastrous 7-1 ruling, the deliberate manipulation of Plessy's lineage laid bare the legal fiction and inherent arbitrariness of state-enforced racial segregation.