Over the past decade, manifestations of social discontent against the impacts of tourism on urban spaces have been on the rise in many tourist cities, pointing to an increasing politicisation “from below” of what had been a non- or minor issue in urban political struggles (Novy and Colomb 2016, 2019). While tourism generates wealth, its negative impacts and adverse side effects have been increasingly problematised and contested. The chapter first discusses what major (new) trends and factors can potentially explain this discontent. It then offers a preliminary typology of the social mobilisations and forms of collective action which have emerged around the impacts of the visitor economy on urban spaces and dwellers, in European cities and beyond. It concludes by outlining the public policy responses to these developments and by sketching directions for a cross-disciplinary, comparative research agenda on the topic.