A manifesto calling for a new kind of architecture that confronts social and economic inequality and uneven urban growth. Spatializing Justice calls for architects and urban designers to do more than design buildings and physical systems. Architects should take a position against inequality and practice accordingly. With these thirty short, manifesto-like texts—building blocks for a new kind of architecture— offers a practical handbook for confronting social and economic inequality and uneven urban growth in architectural and planning practice, urging practitioners to adopt approaches that range from redefining infrastructure to retrofitting McMansions. These building blocks call for expanded modes of practice, through which architects can imagine new spatial procedures, political and economic strategies, and modalities of sociability. Challenging existing exclusionary policies can advance a more experimental architecture not bound by formal parameters. Architects must think of themselves as designers not only of things but of civic processes, complicate the ideas of ownership and property, and imagine new sites of research, pedagogy, and intervention. As one of the texts advises, “The questions must be different questions if we want different answers.” Copublished with Hatje Cantz Verlag