Donald Worster will give a public presentation entitled “North Americans in an Age of Limits” as part of a week long series of public lectures sponsored by the Institute of Island Studies. Biography Donald Worster is professor of U.S. history, environmental studies, and director of the graduate program at the University of Kansas. His books include The Dust Bowl: An Agricultural and Social History, Under Western Skies: Nature and History in the American West; Nature's Economy: A History of Ecological Ideas; The Wealth of Nature: Environmental History and the Ecological Imagination; and A River Running West: The Life of John Wesley Powell.