Mark D. Hersey is associate professor of history at Mississippi State University where he directs the Center for the History of Agriculture, Science, and the Environment of the South. He is author of My Work Is That of Conservation: An Environmental Biography of George Washington Carver.

Ted Steinberg is Adeline Barry Davee Distinguished Professor of History and professor of law at Case Western Reserve University. He is the author of Gotham Unbound: The Ecological History of Greater New York; American Green: The Obsessive Quest for a Perfect Lawn; Down to Earth: Nature's Role in American History; Acts of God: The Unnatural History of Natural Disaster in America; and Nature Incorporated; Industrialization and the Waters of New England.