Perhaps Islamists using biowarfare to take over the rest of Africa. Nothing they do would surprise me. They already have taken large areas in north Africa and have large areas in Somalia, Kenya and are doing cross border raids on into Tanzania.
Some missionary friends of mine in Tanzania are getting a little nervous.
All anyone has to do to wipe out a huge part of the population of Africa is simply neglect it. I’m sure the Islamists will capitalize on this, but they don’t have the brains to engineer it.