Conflicting group interests are neither sufficient nor necessary to produce intergroup discrimination

Evidence

The laboratory analogue of realworld ethnocentrism is in-group bias—that is, the tendency to favor the in-group over the out-group in evaluations and behavior. Not only are incompatible group interests not always sufficient to generate conflict (as concluded in the last section), but there is a good deal of experimental evidence that these conditions are not always necessary for the development of competition and discrimination between groups (Brewer, 1979; Turner, 1981), although this does not mean, of course, that in-group bias is not influenced by the goal relations between the groups. — John T. Jost and Jim Sidanius, Political Psychology, 2701

Categorization

• XREF: connects to: Merely categorizing people into us and them produces discrimination against them — Leonard S. Newman and Ralph Erber (eds.), Understanding Genocide: The Social…, 88