Robert Neuwirth is the author of Stealth of Nations: The Global Rise of the Informal Economy and Shadow Cities: A Billion Squatters, a New Urban World. His articles have appeared in the Nation, New York Times, Washington Post, Harper’s Magazine, Scientific American, Forbes, Fortune, Metropolis and City Limits, among others. He is writing a book about self-governance and outlaw citizenship. On Twitter: @RobertNeuwirth.