Racism
Racism is the process of making judgments based on race. More precisly, racism is institutionalized bigotry. Racism is making broad generalizations about a group of people based on percieved notions, and then making such generalizations part of society. An example is notions of black inferiority being manifested in the form of Jim Crowe laws. As of recent, racism has come to mean the hatred of another person because of the color of his or her skin, or perceived difference in origin. The doctrine of substantive due process in United States constitutional law can be used to invalidate racist laws. Alternately, the equal protection clause of the Fourteenth Amendment can be used to do the same. See e.g. Brown v. Board of Education, 347 U.S. 483 (1954).