This work examines the ways in which the relationship between society and nature is problematic for social theory. The Frankfurt School’s notion of the dialectic of enlightenment is considered, as are the attempts by Jurgen Habermas to defend an ‘emancipatory’ theory of modernity against this. The marginalising effect Habermas’ defence of reason has had on the place of nature in his critical social theory is examined, as is the work of theorists such as Ulrich Beck and Klaus Eder. For these latter authors, unlike Habermas, the social relation to nature is at the centre of contemporary society, giving rise to new forms of modernisation and politics. ¶ Michel Foucault’s work on biopolitics and governmentality is examined against the background of his philosophical debate with Habermas on power and rationality. The growth of scientific ecology is shown to have both problematised the social relation to nature and provided the political technology for new forms of regulatory intervention in the management of the population and resources. These new forms of intervention constitute a form of ecological governmentality along the lines discussed by Foucault and others in relation to the human sciences. ¶ ...