Although it acknowledged some of the plaintiffs’/plaintiffs’ claims, a three-judge panel at the U.S. District Court that heard the cases ruled in favor of the school boards. The plaintiffs then appealed to the U.S. Supreme Court.
When the cases came before the Supreme Court in 1952, the Court consolidated all five cases under the name of Brown v. Board of Education. Marshall personally argued the case before the Court. Although he raised a variety of legal issues on appeal, the most common one was that separate school systems for blacks and whites were inherently unequal, and thus violate the "equal protection clause" of the Fourteenth Amendment to the U.S. Constitution. Furthermore, relying on sociological tests, such as the one performed by social scientist Kenneth Clark, and other data, he also argued that segregated school systems had a tendency to make black children feel inferior to white children, and thus such a system should not be legally permissible.
Meeting to decide the case, the Justices of the Supreme Court realized that they were deeply divided over the issues raised. While most wanted to reverse Plessy and declare segregation in public schools to be unconstitutional, they had various reasons for doing so. Unable to come to a solution by June 1953 (the end of the Court's 1952-1953 term), the Court decided to rehear the case in