We stand in solidarity with you (if it helps our ingroup)

Intraminority solidarity research has previously focused on how similarities in discrimination experiences can facilitate stigma-based solidarity. Yet, research on a lay theory of generalized prejudice has demonstrated that people tend to perceive attitudes towards stigmatized social groups as co-occurring. Integrating these lines of research, the present studies sought to examine if the extent to which prejudices are perceived to co-occur can facilitate stigma-based solidarity for marginalized social groups, and in turn promote interest in coalitional justice. Recruiting heterosexual Black Americans (Study 1), White women (Studies 2-3), and White men (Study 4), the present research demonstrates that perceiving prejudices as co-occurring increases stigma-based solidarity that in turn produces greater interest in coalitional justice efforts that include the ingroup. The present findings demonstrate the importance of focusing on beliefs about perpetrators' attitudes when examining intraminority solidarity and highlight the limitations of a lay theory of generalized prejudice to fight prejudices broadly.