Global climate change is arguably the most challenging collective action problem of our time, affecting everyone on the planet. It also involves complex dynamics that classic collective action theories struggle to capture, such as power imbalances and disparities in influence. Addressing climate change requires that we consider issues of mitigation, adaptation, and the long-term task of building resilient economies and societies amidst evolving climates and shifting social and technical systems. In this subtheme, we invite scientists and practitioners to propose presentations on topics including, but not limited to: polycentric approaches to managing climatic commons, carbon markets and carbon offsets, nature-based climate solutions, people-centered and gender-inclusive strategies for adaptation and mitigation, ecosystem restoration, climate-smart agriculture, clean energy cooperatives, collective action and climate resilience, the Earth Regeneration movement, and the power dynamics and contestations in global climate engagements. We seek contributions that connect climate change to collective action and the commons, offering theoretical insights and practical solutions. Program Committee sub-theme members: Forrest Fleischman, Everisto Mapedza