With a focus on humanity, this richly illustrated examination of social practice in architecture shows how to catalyze productive change in the world’s border regions. Situated at the intersection of architecture, art, public culture, and political theory, Socializing Architecture urges architects and urbanists to intervene in the contested space between public and private interests, to design political and civic processes that mediate top-down and bottom-up urban resources, and to mobilize a new public imagination toward a more just and equitable urbanization. Drawn from decades of lived experience, Teddy Cruz and Fonna Forman engage the San Diego–Tijuana border region as a global laboratory to address the central challenges of urbanization today: deepening social and economic inequality, dramatic migratory shifts, explosive urban informality, climate disruption, the thickening of border walls, and the decline of public thinking. Socializing Architecture follows Spatializing Justice (Cruz and Forman, 2022). It is organized into two main sections—essays and projects—and continues to build a compelling case for architects and urban designers to do more than design buildings and physical systems. Through analysis and diverse case studies, the authors show architects how to alter the exclusionary policies that produce public crisis and instead realize new political and economic strategies that advance a more equitable and convivial architecture.