During the second half of the Twentieth Century, the ideas of leading anarchist thinkers such as Proudhon, Bakunin, and Kropotkin seemed destined to fade into history. But today they are finding new energy and power. Libertarian flags wave above the crowds at anti-globalization and anti-corporation rallies. Anarchist axioms appear in contemporary debates on neoliberalism and ecology. Websites passing on anarchism'sradical principles proliferate in cyberspace. Popular intellectuals like Michel Foucault, Gilles Deleuze, Osvaldo Bayer, Noam Chomsky and Murray Boochkin acknowledge in their work t.Abstract: During the second half of the Twentieth Century, the ideas of leading anarchist thinkers such as Proudhon, Bakunin, and Kropotkin seemed destined to fade into history. But today they are finding new energy and power. Libertarian flags wave above the crowds at anti-globalization and anti-corporation rallies. Anarchist axioms appear in contemporary debates on neoliberalism and ecology. Websites passing on anarchism's radical principles proliferate in cyberspace. Popular intellectuals like Michel Foucault, Gilles Deleuze, Osvaldo Bayer, Noam Chomsky and Murray Boochkin acknowledge in their work t