An promising turn of events requires quite a lot of organization. How many are willing to contribute, how much?
If powerful men always set aside the defense of their individual prerogatives in defense of their class as a whole, Poland might well have had many more decades of independence than they had in the early modern period. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
http://www.iere.org/ILEA/leaf/richard2002.html
Since the discussion is currently about north africa I am going to point out an interesting company currently building things there: http://www.seawatergreenhouse.com/ What this does is turn a patch of desert, which has extremely low biomass, into an extremely high yield agricultural production area. The inputs are steel, glass, and labour and modest amounts of electricity, and if it becomes nessesary, this will scale to feed any number of humans the planet will ever see, forever.