Colliding And Collapsing

In our lifetime we have seen some societies collapse including Somalia and Rwanda.

Jared Diamond gives us five things to look for to avoid such collapses:

1) look for human impact on the environment
2) climate change
3) relations with neighbouring friendly societies-do they pull away or end trade/negotiations?
4) relations with hostile societies-do they block resources?
5) political/economic/social/cultural factors in the society that will make it more or less likely to perceive and solve it's environmental problems