Which called on states to desegregate “with all deliberate speed”?

Brown II, the 1955 Supreme Court decision, directed school desegregation to proceed “with all deliberate speed.” Brown v. Board of Education ruled that segregated public schools were unconstitutional, while Brown II addressed how desegregation should be carried out. The Southern Manifesto opposed desegregation, and Plessy v. Ferguson upheld segregation.

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