On the global stage, world cities define international networks linking business, finance, international travel and transnational communities. In doing so, many are facing growing challenges in making sound policy decisions concerning sustainability and governance while ensuring that they remain attractive to foreign investors. This book on world cities focuses on the major challenges that these cities face in key areas such as governance, environmental and ecological sustainability, social inclusiveness, infrastructural development and financial solvency. Based on case studies from cities in North America, Europe, and the Asia-Pacific, the book throws new light on themes ranging from urban planning to behavioral economics, while the discussion as a whole is framed by the basic premises of good governance and sustainability. These essays by top academics and scholars, professionals, practitioners and policymakers from different parts of the world collectively present their beliefs and best practices on how to strike the balance between growth and sustainability, while also seeking a betterment of the quality of life for the people who live in these cities. The range of perspectives introduced here, together with the reservoir of information and ideas, will make it an invaluable resource for researchers, city planning professionals and related practitioners, as well as policymakers in environment, urban development and urban economic planning.