Book excerpt: This volume discusses how commonality and difference are negotiated across heterogeneous social movements in Latin America, especially Peru. It applies cosmopolitics as an analytical lens to understand the intricacies of social movement encounters across difference, without imposing colonial hierarchies or categorizations. The author blends multiple theoretical approaches—such as social movement research, postcolonial feminism, and post-foundational discourse theory—with ethnographic insights to develop a theory of cosmopolitical solidarity. Providing a transnational and intersectional perspective on the politics of social justice in a postcolonial context, this book will appeal to students of social movements, gender studies, racism, Latin American studies, and international relations, as well as practitioners involved in activism, social work, or international cooperation.