Webcast sponsored by the Irving K. Barber Learning Centre and hosted by the Vancouver Institute. Described by the Boston Globe as "the nation's leading environmentalist," Professor McKibben is the author of more than a dozen books, including The End of Nature, Enough: Staying Human in an Engineered Age, and Deep Economy. A former staff writer for the New Yorker, he writes often for Harper's, National Geographic, and the New York Review of Books, among other publications. He is the founder of the environmental organizations Step It Up and 350.org, a global warming awareness campaign that in October 2009 coordinated what CNN called "the most widespread day of political action in the planet's history."