Robert Engelman, President of the Worldwatch Institute, a renowned environmental think tank based in Washington, D.C., directs the Institute’s 21-person staff and pursues research in the areas of climate change, human population dynamics, and sustainability science. The Population Institute awarded his book, More: Population, Nature, and What Women Want, the Global Media Award for Individual Reporting in 2008. Engelman’s writing also has appeared in Nature, The Washington Post, Scientific American and The Wall Street Journal. (www.worldwatch.org)