Bill McKibben is the author of a dozen books about the environment, beginning with The End of Nature in 1989, which is regarded as the first book on climate change for a general audience. He is a founder of the grassroots climate campaign 350.org, which has coordinated fifteen thousand rallies in 189 countries since 2009. Time magazine called him “the planet's best green journalist,” and the Boston Globe said in 2010 that he was “probably the country's most important environmentalist.”