The UN's urban sustainability goal (#11) is fundamental to the global sustainable development agenda. David Simon explains the anatomy and dynamics of SDG 11, and critically assess how it is being used and understood in different local, regional and national contexts. Supported by case studies throughout, Simon considers how SDG 11 interacts with other Sustainability Development Goals and how competing indicators, other external constraints, as well as lack of political will can present tough challenges to implementation. He provides a balanced and dispassionate analysis, highlighting problems and limitations alongside positive applications. A key aspect of the unfolding story of the SDGs is how they play out in practice. Although some of the connections and complementarities were designed, others are shown to have emerged by default. Drawing on lessons learnt so far, Simon considers how realistic sustainability goals are for cities and human settlements worldwide, and asks how different will cities be by the end of the SDG's 15-year lifespan in 2030? Written for students, policy-makers and practitioners, the book provides an authoritative assessment of one of the most important and integrative SDGs.