Discrimination prevented Blacks from getting an education, eating at some restaurants, riding on some transportation, buying a house, getting most jobs, etc.
Discrimination is about the most harmful and evil thing anyone could ever do.
An economic slave is the basis of feudalism.
The baron was given ownership of the land, so then all the serfs had to do what the barons demanded, or starve to death.
Feudalism was economic slavery.
The whole point of Marxism is to prevent economic slavery, and give workers government protection.