Plessy v. Ferguson was a landmark 1896 U. S. Supreme Court decision that upheld the constitutionality of racial segregation under the “separate but equal” doctrine.

Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation. As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brownv.

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