For the past three years, an annual conference called the World Social Forum has been the biggest international gathering of radicals on earth, attended by all the leaders of the world left. Labor unions, Communist parties, non-governmental organizations, anti-globalization activists, anti-American 'peace' groups, multiple heads of state, and the representatives of armed guerilla insurgencies all gather yearly at Porto Alegre, Brazil, to make new connections and plan for the future. While the organizers of the World Social Forum claim the event is a "open meeting place" for those interested in building "a planetary society centered on the human person,"...