Stereotypes are generalizations about groups of people that attribute a set of characteristics to them. Stereotypes simplify groups based on assumptions. They can be positive or negative. Stereotypes come from books, TV, advertising, and what adults teach children. Stereotyping can cause mistaken beliefs, affect judgments of individuals, lead to discrimination, and damage self-image and self-esteem. Personal morality and respecting diversity can help defeat negative stereotyping.