 John Clark has argued that social ecology is heir to a historical, communitarian tradition of thought that includes not only the anarchist Peter Kropotkin, but also the nineteenth century socialist geographer Elisée Reclus, the eccentric Scottish thinker Patrick Geddes and the latter’s disciple, Lewis Mumford (Clark 1998). Ramachandra Guha has described Mumford as “the pioneer American social ecologist” (Guha 1996, 210). Mumford adopted a regionalist perspective, arguing that strong regional centres of culture are the basis of “active and securely grounded local life” (Mumford 1944, 403). Like the pessimists in critical theory, Mumford was worried about the emergence under industrialised capitalism of a “megamachine”, one that would oppress and dominate human creativity and freedom, and one that—despite being a human product—operates in a way that is out of our control. While Bookchin is more of a technological optimist than Mumford, both writers have inspired a regional turn in environmental thinking. Bioregionalism gives regionalism an environmental twist. This is the view that natural features should provide the defining conditions for places of community, and that secure and satisfying local lives are led by those who know a place, have learned its lore and who adapt their lifestyle to its affordances by developing its potential within ecological limits. Such a life, the bioregionalists argue, will enable people to enjoy the fruits of self-liberation and self-development (see the essays in List 1993, and the book-length treatment in Thayer 2003, for an introduction to bioregional thought).