Ruth Defries

Ruth DeFries is University Professor and Denning Family Professor of Sustainable Development in the Department of Ecology, Evolution, and Environmental Biology at Columbia University. She is a recipient of the MacArthur "Genius" Fellowship and a member of the U.S. National Academy of Sciences. Her books include The Big Ratchet: How Humanity Thrives in the Face of Natural Crisis (2014).

Ruth DeFries is University Professor and Denning Family Professor of Sustainable Development in the Department of Ecology, Evolution, and Environmental Biology at Columbia University. She is a recipient of the MacArthur "Genius" Fellowship and a member of the U.S. National Academy of Sciences. Her books include The Big Ratchet: How Humanity Thrives in the Face of Natural Crisis (2014). See less