For a hundred years after the end of the Civil War, a quarter of all Americans lived under a system of legalized segregation called Jim Crow. Together with its rigidly enforced canon of racial "etiquette," these rules governed nearly every aspect of life - and outlined draconian punishments for infractions.The purpose of Jim Crow was to keep African Americans subjugated at a level as close as possible to their former slave status. Exceeding even South...