Book excerpt: In cities around the world, planning and health experts are beginning to understand the role of social and environmental conditions that lead to trauma. By respecting the lived experience of those who were most impacted by harms, some cities have developed innovative solutions for urban trauma. In Cities for Life, public health expert Jason Corburn shares lessons from three of these cities: Richmond, California; Medellín, Colombia; and Nairobi, Kenya. Corburn draws from his work with citizens, activists, and decision-makers in these cities over a ten-year period, as individuals and communities worked to heal from trauma--including from gun violence, housing and food insecurity, poverty, and other harms. Cities for Life is about a new way forward with urban communities that rebuilds our social institutions, practices, and policies to be more focused on healing and health.