This book discusses lessons and challenges of metropolitan circles development and urbanization in Asia, Europe, North America, Latin America and Africa. The book examines the effects of local governance systems, central-local relations, and administrative borders on metropolitan area development. It surveys economic, social and environmental issues, with an emphasis on how interconnectivity, circular economy, and climate issues should be integrated into megaregion development planning.The chapters are selected papers from the international conference on metropolitan circles development and urbanization jointly held by the Institute of Public Policy (IPP) at the South China University of Technology and UNESCO in 2018. Contributors from the US, the UK, Japan, France, Singapore, Indonesia, Mexico, Tanzania present their questions, observations, and analyses in a narrative and descriptive style which appeal to a wide range of audience.