Book excerpt: Urban Ills: Twenty First Century Complexities of Urban Living in Global Contexts is a collection of original research focused on critical challenges and dilemmas to living in cities. Volume 2 is devoted to the myriad issues involving urban health and the dynamics of urban communities and their neighborhoods. The editors define the ecology of urban living as the relationship and adjustment of humans to a highly dense, diverse, and complex environment. This approach examines the nexus between the distribution of human groups with reference to material resources and the consequential social, political, economic, and cultural patterns which evolve as a result of the sufficiency or insufficiency of those material resources. They emphasize the most vulnerable populations suffering during and after the recession in the United States and around the world, and the chapters examine traditional issues of housing and employment with respect to these communities.