Simon A. Levin is the James S. McDonnell Distinguished University Professor in Ecology and Evolutionary Biology at Princeton University and the Director of the Center for BioComplexity in the Princeton Environmental Institute. His research examines the structure and functioning of ecosystems, the dynamics of disease, and the coupling of ecological and socioeconomic systems. Levin is a Fellow of the American Academy of Arts and Sciences and the American Association for the Advancement of Science, a Member of the National Academy of Sciences and the American Philosophical Society, and a Foreign Member of the Istituto Veneto di Scienze, Lettere ed Arti, and the Istituto Lombardo (Milan). He has over 500 publications and is the editor of the Encyclopedia of Biodiversity and the Princeton Guide to Ecology. Levin’s awards include: the Heineken Prize for Environmental Sciences, Kyoto Prize in Basic Sciences, Margalef Prize for Ecology, the Ecological Society of America’s MacArthur and Eminent Ecologist Awards, the Luca Pacioli Prize (Ca’Foscari University of Venice), the Tyler Prize for Environmental Achievement, and the National Medal of Science.