Separate but equal

Separate but equal was a legal doctrine that existed in the United States for 58 years. It was based on the United States Supreme Court decision "Plessy v. Ferguson". Here the Court ruled that racial segregation was not in violation of the Fourteenth Amendment to the United States Constitution, as long as the racially separate facilities were equal. The Court also said segregation was not discrimination. Segregation in public accommodations, transportation and schools was legally justified by "Plessy" until it was overturned in 1954 by "Brown v. Board of Education". 
Background.
After the American Civil War, the Republican controlled Congress passed three amendments to the Constitution called the Reconstruction Amendments. The first was the Thirteenth Amendment to the United States Constitution which abolished slavery in the United States. The second was the Fourteenth Amendment to the United States Constitution which provided equal protection of the laws to all citizens. The third was the Fifteenth Amendment to the United States Constitution that gave voting rights to African American men.
After the passage of the reconstruction amendments, things began to get worse for black people in the South. Many whites would not accept the new changes. The economy in the south was stagnant and taxes were high. There was a good deal of corruption which was made worse by carpetbaggers from the north and southern supporters of reconstruction called scalawags. Out of fear and hatred, white supremacy groups such as the Ku Klux Klan were born. Through the use of violence including lynching, rape, murder and terrorism, they sought to control African Americans and keep them from using their new rights.
Congress enacted the Civil Rights Act of 1875. It guaranteed African Americans equal treatment in public accommodations, public transportation, and to prevent being excluded from jury duty. The bill was passed by the 43rd United States Congress and signed into law by President Ulysses S. Grant on March 1, 1875. Several years later, the Supreme Court ruled in "Civil Rights Cases" (1883) that sections of the act were unconstitutional. The Court's reasoning was the Fourteenth Amendment prohibited discrimination by states not by individuals. As a result Congress could not protect against individual cases of discrimination.
"Plessy v. Ferguson".
Florida was the first to pass a law requiring railroads to provide “equal but separate accommodations for the white, and colored, races”. Soon, Texas, Mississippi and other states had the same or similar laws. In 1890, when Louisiana passed a similar law, blacks began resisting. In 1892 it was agreed Homer Plessy would challenge the laws in order to form a test case. Plessy "passed" for white and while riding on an East Louisiana train in the "white section" announced he was black and refused to move to the "colored" section. Plessy was arrested and 1896 his case reached the Supreme Court. The case was "Plessy v. Ferguson", Fergusson being the name of the Judge who first ruled against him in the New Orleans Criminal District Court. 
In 1896, the Supreme Court heard the case. Plessy's lawyers argued Louisiana's Separate Car Act violated the Thirteenth and Fourteenth Amendments. The Court, in a 7-1 decision decided against Plessy and that the law was constitutional. Writing the majority opinion, Justice Henry Brown wrote:
The lone dissenter, Justice John Harlan, saw terrible consequences in the judicial opinion rendered by the court. He wrote:
 The problem with "Plessy" was that separate was almost always never equal. The public schools and other facilities designed for blacks were always inferior.
Jim Crow era.
Beginning in 1890, Southern Democrats began to pass state laws that took away the rights African Americans had gained. These racist laws became known as Jim Crow laws. "Plessy" caused Jim Crow laws to go unchallenged by the federal government for 58 years. They included laws that made it impossible for blacks to vote. Since they could not vote, blacks also could not be on juries. Other laws required racial segregation so blacks could not go to the same schools, restaurants or hospitals as whites. They could not use the same bathrooms or drink from the same drinking fountains. They could also not sit in front of whites on busses or trains. Many southern Christian ministers taught that whites were the chosen people and blacks were cursed by God. Lynchings were designed to instill fear in blacks and keep them in their place. Between 1882 and 1968, 3,440 black men and women were lynched. Others were burned at the stake, castrated, beaten or murdered. The Jim Crow era began to end after the Supreme Court’s unanimous Brown v. Board of Education decision overruled Plessy.