Answer
In 1954, Thurgood Marshall helped the National Association for the Advancement of Colored People (NAACP) win a landmark Supreme Court case, Brown v. Board of Education, which overturned the "separate but equal" doctrine established by the Supreme Court in Plessy v. Ferguson in 1896. The Brown decision ruled that racial segregation in public schools was unconstitutional, and it paved the way for the desegregation of schools and other public facilities.