Curt Meine, Ph.D., is a conservation biologist, historian, and writer. His biography 'Aldo Leopold: His Life and Work', was the first full-length biography of Leopold, and was named Book of the Year by the Forest History Society. In this episode of Nature Revisited Curt discusses American ecologist Aldo Leopold's life and his influential 1949 work 'A Sand County Almanac' which championed the idea of a "land ethic", or a responsible relationship existing between people and the land they inhabit. After more than seventy years, Leopold's Almanac still stands as one of the most significant environmental books of the 20th century.