This article offers a comparative account of the engagement of two key transnational social movements, the agrarian movement La Via Campesina (LVC) and the International Indigenous Peoples’ Forum on Climate Change (IIPFCC), in global climate discussions, particularly the United Nations Framework Convention on Climate Change. Since 2007 these movements have each developed their own framing of climate justice and sought political and legal opportunities to advocate rights-based policies. LVC has advanced a development paradigm grounded in food sovereignty and agroecology, and IIPFCC has sought to increase indigenous participation in United Nations climate schemes and regain control over ancestral territory.