Bill McKibben is the author of a dozen books, including The End of Nature and Deep Economy: The Wealth of Communities and the Durable Future. A former staff writer for The New Yorker, he writes regularly for Harper's, The Atlantic Monthly, and The New York Review of Books, among other publications. In April 2007, he organized the Step It Up National Day of Climate Action, one of the largest global warming protests to date. Most recently, he was co-founder of 350.org, an international grassroots campaign that aims to mobilize a global climate movement united by a common call to action. He is a scholar-in-residence at Middlebury College, and lives in Vermont with his wife, the writer Sue Halpern, and their daughter.