The article is a theoretical study of state sovereignty. By looking at the concept in a different way from traditional methods, it tries to discern whether sovereignty is necessarily antithetical to a sustainable world. Emphasis is put on its territoriality and anthropocentrism – both of which make it into a major obstacle when tackling global and transnational environmental problems. State sovereignty is analyzed as an environmental practice of the state, which allows for the control of resources to be used by capital. The analysis is conducted using theoretical and conceptual critique as the main method. It is based on various sources ranging from critical geopolitics and critical geography to political science and political ecology, including the concept of Capitalocene. As long as sovereignty remains utilized by the state in service to capital, it will be used to cement its ability to control space and extract resources. However, a different kind of sovereignty is imaginable and therefore the institution itself is neither friend nor enemy to environmental politics. This new understanding of sovereignty opens up new avenues for theoretical research in political ecology and International Relations, bridging the gap between traditional state-centric approaches and the transboundary nature of ecological problems.