WHAT ARE THE CONCLUSIONS?
- No country has a level of overall sustainability greater than 40%!
- Existing economies are not in sustainable path because, especially, of the continuing destruction of their ecological system
- Fuzzy methodology permits to combine ecological, economical, social, and political concepts in order to evaluate overall sustainability degree
- Fuzzy evaluation can compensate the lack of full knowledge of ecological and human system and, therefore, it permits the simulation of their evolutions
- “SAFE” model, by introducing a new insight, helps to better understand and seize the concept of sustainabilitty
- “SAFE” model suggests a new and simple definition of sustainability for society development (in local, regional, national, or global scale) as: “the non declining quality of human and ecological system”