Abstract

Under conditions of high social and political polarization, expressing political anger online toward systemic injustice faces an apparent trilemma: Express none but lose anger's valuable goods; express anger to heterogeneous audiences but risk aggravating inter-group polarization; or express anger to like-minded people but succumb to the epistemic pitfalls and extremist tendencies inherent to homogeneous groups. Solving the trilemma requires cultivating an online environment as a deliberative system composed of four kinds of groups—each with distinct purposes and norms. I argue that applying empirically-guided design principles to this systems framework provides political anger a place where its powers can serve justice without damaging the epistemic, ethical, emotional, and community resources required for a democratic path to correcting systemic injustice.