Bill McKibben is an American environmentalist and writer who frequently writes about global warming and alternative energy  and advocates for more localized economies. In 2010 the Boston Globe called him "probably the nation's leading environmentalist" and Time magazine described him as "the world's best green journalist. In 2009 he led the organization of 350.org , which coordinated what Foreign Policy magazine called "the largest ever global coordinated rally of any kind," with 5,200 simultaneous demonstrations in 181 countries. The magazine named him to its inaugural list  of the 100 most important global thinkers, and MSN named him one of the dozen most influential men of 2009.