Racism is the belief that a particular race is superior or inferior to another, that a person’s social and moral traits are predetermined by his or her inborn biological characteristics. Racial separatism is the belief, most of the time based on racism, that different races should remain segregated and apart from one another.
Racism has existed throughout human history. It may be defined as the hatred of one person by another — or the belief that another person is less than human — because of skin color, language, customs, place of birth or any factor that supposedly reveals the basic nature of that person. It has influenced wars, slavery, the formation of nations, and legal codes.
from the Anti-Defamation League website