Daniel Hillel is professor emeritus of environmental studies, University of Massachusetts, and senior research scientist, Center for Climate Systems Research, Columbia University. He is the author or editor of more than twenty books, including Negev: Land, Water, and Life in a Desert Enviornment; Out of the Earth: Civilization and the Life of the Soil; and Rivers of Eden: The Struggle for Water and the Quest for Peace in the Middle East. He is the 2012 World Food Prize Laureate.