Still interested in sustainability thinking?

This paper has been read over 1200 times just in ResearchGate, you may find it interesting: it advances of formal theory of sustainability and of the indices that go with it using qualitative comparative thinking and tools.

You can look at it when you have time:

Beyond traditional sustainable development: Stating specific and general sustainability theory and sustainability indices using ideal present-absent qualitative comparative conditions

https://www.researchgate.net/publication/281276522_Beyond_traditional_sustainable_development_Stating_specific_and_general_sustainability_theory_and_sustainability_indices_using_ideal_present-absent_qualitative_comparative_conditions