The leading theories of the causes of prejudice include social learning and personality differences. No single cause has been identified as the cause of prejudice, but it's likely that there are multiple causes that can contribute in different cases.
Prejudice is a term that describes treating someone differently based on their gender, skin color, social class or other similar trait. Typically, prejudice is directed towards people that differ in some way. People with a personality that emphasizes homogeneity may look down upon people that are different in an obvious way. It is also theorized that children may learn prejudice as acceptable behavior from adults.