Our guest series "Building Solidarities," organized by Dr. Anooradha Iyer Siddiqi and students in the course "Colonial Practices," was originally staged as a series of discussions at Barnard College and Columbia University Institute of Comparative Literature and Society in the fall of 2020. The series was conceived as a form of mutual pedagogy between the campus and the public, through dialogues on urgent questions about constructed environments, urban life, and ecologies. This episode discussed structuring cultural institutions and critical communities of black-brown solidarity in the African and South Asian diasporas of Nairobi and New York.