This case is argued to be the most well-known ruling of the 20th century. This case overturned Plessy v. Ferguson. The case established that " separate educational facilities are inherently unequal." The case began in December 1952 and was decided on May 17th 1954. The case arouse in Kansas, South Carolina, Virgina, Delaware, and Washington D.C. with relation to the segregation of public schools on the basis of race. The court had a unanimous decision explaining that the separate-but-equal doctrine violated the Equal Protection Clause of the 14th Amendment. This was important in helping end legally mandate race-segregated schools.