The document summarizes two Supreme Court cases - Plessy v. Ferguson (1896) and Brown v. Board of Education (1954) - that had opposing rulings on segregation. Plessy v. Ferguson upheld the doctrine of "separate but equal" and allowed racial segregation. Brown v. Board of Education overturned this decision and ruled that racial segregation in public schools was unconstitutional, marking a pivotal moment in the civil rights movement.