In 1935, when Paul Sears set out to write his book, Deserts on the March, drought gripped much of the United States, and the Dust Bowl was at its worst. Great dust clouds were blowing as far east as New York and Washington, D.C. The publication of Deserts on the March had a profound impact in awakening America to the task of controlling soil erosion through proper land management and understanding of ecological relationships. Today, global desertification...