A further methodological cornerstone of the project is a genuine sustainability theory. Here, sustainability is understood as system viability. Within a diversity of (social) spheres the model maintains a system specific sustainability as core normative foundation of every social system (economic, political, cultural, ecological). System specific ‘sustainabilities’ could conflict with each other as well as with diverse sustainabilities of natural systems. A reflexive approach is needed to balance different natural and social system normativities. Within the project the reflexive sustainabilities model enables inter alia a comparative sustainable debt index.

Funded by the European Union (ERC, RESOLVENCY, 950427). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.