Board of Education, the 1954 landmark Supreme Court decision that struck down the doctrine of 'separate but equal' and ordered an end to school segregation.

Why did separate but equal end?

Because new research showed that segregating students by "race" was harmful to them, even if facilities were equal, "separate but equal" facilities were found to be unconstitutional in a series of Supreme Court decisions under Chief Justice Earl Warren, starting with Brown v. Board of Education of 1954.

Did Plessy v Ferguson end separate but equal?

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. ... As a result, restrictive Jim Crow legislation and separate public accommodations based on race became commonplace.