The academic debate in this book spans multiple disciplines, such as Tourism, Geography, Urban Planning, Law and Economics. The approaches are equally varied: while many Tourism scholars try to save or justify tourism growth, Urban Planners may preferably seek to prevent gentrification, to minimize tourism externalities and to 'return' the city to its residents. The purpose of this book is to include the different positions in the debate; to give insight in the potential future evolution of the phenomenon; to propose policies and strategies and to identify underlying mechanisms of the massification of travel.