Stability looks like being the key. That Gapminder website included a neat lecture on why although we think that free, democratic societies tend to be the ones with the best economic development its actually the ones that are the most stable for the longest period of time.
I'm still waiting for our new government to do anything it said it would before being elected, other than supposedly deep spending cuts which actually only slow down the increase in spending and not reduce it.
Anyway this is not a political thread...