The opening chapter of this book makes the intellectual and political argument for a more critical understanding of seawater desalination as an emerging phenomenon of water governance. Its purpose, in this sense, is to politicise seawater. The chapter provides an overview of the historic and contemporary development of desalting technologies and the global desalination industry. We argue that, rather than seeing desalination as a water management ‘solution’, it should instead be understood as a socio-technical and political ecological ‘fix’, which allows cities, regions and countries to overcome some of the hydrological barriers to growth and accumulation, while creating or intensifying other social and ecological contradictions. These contradictions, we demonstrate, revolve around the governance of water, privatisation and commercialisation, the water-energy nexus, and marine ecology. Finally, we summarise the substantive chapters included in the book.