Answer:
Plessy v. Ferguson established the concept of separate but equal in the law in 1896. This case became the basis for the Jim Crown system. The NAACP Legal Defense Fund led by Charles Hamilton Houston led the fight to overturn Plessy. They began by challenging the idea of separate but equal beginning with graduate and professional schools and ending with primary and secondary schools.
Explanation: Brown v. Board of Education was a compilation of cases, which included earlier cases related to graduate and professional schools.