Factors

I have come up with a few factors to do with sustainability (although these factors have many sub-points that relate to them)

• Care for/managment of the environment
• Warfare
• Trade/Economy
• Cultural/religion
• Government/system of laws/religion

Coincidentally this equates to a five point framework (at the moment) though I'm sure that I'll think of something else later. I think that the factors that make a society collapse are also what make them sustainable if used in reverse. That's probably why this resembles Jared Diamond's framework.