Roger Thurow

When famine, drought, and malnutrition plagued their communities, these farmers tried something revolutionary—and managed to nourish their families and their land in the process. Farmers in some of the world's oldest agricultural areas—Africa's Great Rift Valley, India's Indo-Gangetic Plain, the Highlands of Central America, and the Great Plains of the U.S.—were toiling year after year, only to find that modern...