kharne,
I think things would slow down a bit in some ways.
Conflict in Africa is at least partially driven by resources (oil, diamonds, rare earths, minerals, timber) and in some areas ideological agitation from Islamists. There would probably be a trickle of trade with the outside world (North America, parts of Europe, even Australia) with weapons being brought in and some resources shipped out, but the "fuel" for many of the fires would be greatly reduced.
However, the political problems won't go away and won't be mitigated by pressure from the outside world (although one could argue such influence does more harm than good). The aid that props up many regimes and prevents a total medical collapse and famine would dry up. I would say that governments would collapse and starvation would be rampant, as well as AIDS-related deaths (because of complications due to malnutrition).
Tony
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