We thank Bill Turner, Bill Clark, Robert Corell, Lindsey Christensen, Noelle Eckley, Grete Hovelsrud-Broda, Jeanne Kasperson, Roger Kasperson, Marybeth Martello, Svein Mathiesen, Rosamond Naylor, Colin Polsky, Alexander Pulsipher, Andrew Schiller, Henrik Selin, and Nicholas Tyler for their assistance in the development, analysis, and interpretation of this work in the context of our broader vulnerability research. Ivan Ortiz-Monasterio was there for every part of the work. This work was supported in part by National Science Foundation Grant BCS-0004236, with contributions from the National Oceanic and Atmospheric Administration’s Office of Global Programs for the Research and Assessment Systems for Sustainability Program (http://sust.harvard.edu). It builds on collaborations sponsored by the Stockholm Environment Institute with Clark University, the Consortium for Social Science Associations, the International Human Dimensions Program, and the Land-Use/Cover Change Focus 1 Office at Indiana University.