an extended sphere of political action in the postnational constellation this book argues that the political model of deliberative democracy provides a meaningful conceptualization of NGOs as legitimate partners of corporations and it develops a conceptual framework that specifically allows distinguishing legitimate partner NGOs from two related actor types with whom they share certain characteristics but who differ with respect to their legitimacy. These related actor types are interest groups on the one hand and activists on the other hand. In conclusion it argues that a focus on the behaviour of NGOs is most meaningful for distinguishing them from interest groups and activists.