Time Bomb
Finding a cheap cure for diarrhea I think really helped to screw things up in Africa. Now with infant mortality plunging there is all of a sudden a huge strain on resources. We were fortunate pass on advanced cultivation technology to Africa. This helped some but for whatever reason it has not been enough to lift their standard of living to the point where most Africans don't feel the compulsion to over breed. Also look at the growth rates for the Middle East and Persian countries. Think of all the disenfranchised young males and you start to understand how an organization like Al-Qaeda can become so powerful.