This work represents Murray Bookchin's riposte to the antihumanism, mysticism and antirationalism which are influencing many people's attitudes to environmental problems. Bookchin offers a critique of, among others, social Darwinists, deep ecologists, new agers, technophobes, Foucault, Derrida and Baudrillard. This intellectual tour-de-force offers a positive alternative approach to politics based on a refreshing confidence and belief in human potential.