Relations between groups, for example those based on race, ethnicity, nationality, gender, age, ability, and socio-economic status, provide the context for everyday life. Intergroup relations frame the way we define ourselves and others, the way we behave, and the way in which we treat and think about others, and how they treat and think about us. Consider how profoundly affected everyday life is by whether relations between groups are harmonious and peaceful, or conflictual and hostile. Not surprisingly, intergroup relations is an exhilarating core topic in social psychology;