Alf Hornborg (Ph.D., Cultural Anthropology, Uppsala University) is Professor and Chair of the Human Ecology Division at Lund University, Sweden. Professor Hornborg is the author of many articles and several books on technology, ecology, unequal exchange, and world systems theory, including Dualism and Hierarchy in Lowland South America (1988), Negotiating Nature: Culture, Power, and Environmental Argument, with G. Pálsson (2000), and The Power of the Machine: Global Inequalities of Economy, Technology, and Environment (2001). He is currently working on a forthcoming co-edited volume from Columbia University Press titled World System History and Global Environmental Change.