Research on social identity theory has discovered that when it comes to group membership, we do four things to maintain positive self-esteem: (1) We tend to gravitate toward and form groups with similar others; (2) once the group is formed we engage in group-serving biases that defend the group’s positive identity; (3) we try to increase our status by associating with higher-status groups and distancing ourselves from lower-status groups; and (4) if all else fails we literally disparage other groups because in doing so, we elevate our own group.
