Racism is the practice of discriminating against people based on their race or ethnic background. We should all work to stamp out racism.
Racism can refer either to the general belief that different races have different abilities (and that some races are inherently superior to others) or to the actual practice of discriminating against people because of their race. Jim Crow laws in the United States institutionalized racism, codifying discrimination against African Americans. Many worldwide political movements have fought to end racism.