If you asked a Water Minister from a developing country what makes a product or service successful, you might hear an answer that would have sounded familiar forty years ago. At World Water Forum 6 last March in Marseille, politicos measured the progress of their projects in figures such as the number of hectares that have come under new irrigation, or large-scale dam projects that are nearly complete and so on. Those kinds of figures should give a sense of deja vu if you worked on water projects during the Green Revolution from the 1940s to the 1970s. The fact that we’re using those same metrics raises some questions. Why should India need a new green revolution when it supposedly already happened there forty years ago? Why should Mexico be trumpeting adherence to integrated water resource management principles in irrigation reform fifty years after their green revolution? And those questions raise a bigger one: What exactly is sustainable water management?