Sovereignty, ecology, and regional imperatives: formulating normative foundations for regional ecological justice

I will outline four justifications of regional ecological obligations calling for different political authorities to collaborate for ecological reasons: through voluntary agreement between political entities united by an ecological region; by a shared regional history or cultural relations to an ecological region; with reference to ‘place-based’ duties with an ecological basis; or by obligations to an extended set of individual right-holders. None are conclusive reasons but show that there are normative grounds for regional collaboration of separate political authorities. The article contributes to discussion on, despite its practical relevance, a much neglected concept in political philosophy.