The Jim Crow laws were segregationist laws in the USA between 1876 and 1965. The theory of these laws was 'separate but equal', but the fact was quite different, and was one of the inherent causes of the Civil Rights movement. These laws were effectively a form of apartheid. Even the name 'Jim Crow' was a caricature of African Americans. The effect of many different Jim Crow laws was progressively restrictive, and disenfranchised many southern blacks. Despite Supreme Court overturning of many of these laws, it took until the mid 60s to finally abolish the system.
Examples of Jim Crow Laws:
Montgomery bus boycott|
Laws against interracial marriage
Martin Luther King.