Jim Crow

Jim Crow laws were laws at the state and local levels that codified discrimination against African-Americans in the United States. While popularly thought to be exclusive to the Southern region of the U.S., 36 states had Jim Crow laws. Beyond just the legal classifications, the laws help enforce discrimination, segregation, and white privilege as a way of life.

Wikipedia
Jim Crow laws
List of Jim Crow law examples by state

Video
The Birth of Jim Crow (PBS)

Further Reading
What was Jim Crow (Jim Crow Museum | Ferris State University)
Jim Crow Laws (PBS)
A Brief History of Jim Crow (Constitutional Rights Foundation)
Jim Crow Laws (history.com)
A list of some Jim Crow laws (Smithsonian Institute)