This book provides an overview of the Horizontal Metropolis concept, and of the theoretical, methodological and political implications for the interdisciplinary field in which it operates. The book investigates the contemporary emergence of a new type of extended urbanity across regions, territories and continents, up to the global scale. Further, it explores the diffusion of contemporary urban conditions in an interdisciplinary and original manner by analyzing essential case studies. Offering extensive content on the Horizontal Metropolis concept, the book presents a range of approaches intended to transcend various inherited spatial ontologies: urban/rural, town/country, city/non-city, and society/nature. The book is intended for all readers interested in the emergence and development of new approaches in cultural theory, urban and design education, landscape urbanism and geography.