Rising partisan animosity is linked to less support for democracy and more support for political violence. Here we provide a multi-level review of interventions designed to improve partisan animosity, which we define as negative thoughts, feelings, and behaviors towards a political outgroup. We introduce the TRI framework for the three levels of interventions-Thoughts (correcting misconceptions, highlighting commonalities), Relationships (building dialogue skills, fostering positive contact), and Institutions (changing public discourse, transforming political structures)-and connect these levels by highlighting the importance of motivation and mobilization. Our review encompasses both interventions conducted as part of academic research projects, as well as real-world interventions led by practitioners in nonprofit organizations. We also explore the challenges of durability and scalability, examine self-fulfilling polarization and interventions that backfire, and discuss future directions for reducing partisan animosity.

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Rising partisan animosity is linked to less support for democracy and more support for political violence. Here we provide a multi-level review of interventions designed to improve partisan animosity, which we define as negative thoughts, feelings, and behaviors towards a political outgroup. We introduce the TRI framework for the three levels of interventions—Thoughts (correcting misconceptions, highlighting commonalities), Relationships (building dialogue skills, fostering positive contact), and Institutions (changing public discourse, transforming political structures)—and connect these levels by highlighting the importance of motivation and mobilization. Our review encompasses both interventions conducted as part of academic research projects, as well as real-world interventions led by practitioners in nonprofit organizations. We also explore the challenges of durability and scalability, examine self-fulfilling polarization and interventions that backfire, and discuss future directions for reducing partisan animosity.