Bjorn Lomborg is president of the Copenhagen Consensus Center, a think tank dedicated to applying economic analysis, including cost-benefit analysis, to proposed policies around the issues of the day. He’s also a visiting professor at Copenhagen Business School and visiting fellow at the Hoover Institution at Stanford University. He's the author of many books, including the 2001 bestseller The Skeptical Environmentalist. His latest book, and the topic for this interview, is Best Things First.