If water resources are to be distributed efficiently, equitably and cost-effectively in this rapidly changing world, then it is clear that current water management practices are no longer feasible. Innovative approaches are required to meet the increasing water demands of a growing world population and economy and the needs of the ecosystems supporting them. New approaches have to be employed at global, national and local levels. In Rethinking Water Management, a new generation of water experts from around the world examine the critical challenges confronting the water profession, including rainwater and groundwater management, recycling and reuse, water rights, transboundary access to water and financing of water. They offer important new perspectives on the use, management and conservation of fresh water, in terms of both quantity and quality, for the domestic, agricultural and industrial sectors, and show how a new set of paradigms can be applied to successfully manage water for the future. Caroline Figueres is Head of the Urban Infrastructure Department at UNESCO-IHE Water Education Institute in The Netherlands. Cecilia Tortajada is Vice President of the Third World Centre for Water Management in Mexico and Vice President-elect of the International Water Resources Association. Johan Rockström is Water Resources Expert at UNESCO-IHE.