Object relations theories focus on the interpersonal lives of individuals. In order to address problems in society we need to extend our concepts to include the large group in the mind. The social object representation reflects the unconscious aspect of large group identity. It is interrelated with, but separate from object representations that pertain to historically significant interpersonal relationships. The social object influences perception and behavior when we function as members of a large group and collective identity is salient. An object relations perspective on prejudice and war reorients our understanding of the problem from a conflict between two groups, to examine the relationship between the individual and his or her large group (ingroup). Consideration of the meaning of aggression and the conditions that lead to an overidentification between the person and the ingroup are discussed.