Freshwater is the binding physical constraint on food production, population geography, and geopolitical stability — yet most of it is priced at zero, measured poorly, and allocated by nineteenth-century law. The Water Productivity Gap quantifies how far below maximum efficiency the world operates, and what the gap means for a planet of 10 billion.
Examines the governance architecture of water — nineteenth-century law, political seniority allocation, and sub-economic pricing — against the arithmetic of transboundary conflict, desalination economics, and governed commons.