There are many stories written about the slums of the world's exploding mega-cities. There is a new book out called "Arrival City: The Final Migration and Our Next World. The movement of humanity into urban areas currently taking place is the single largest migration inour history as a species. The history of the next century will be written in these cities.
More valuable than a dozen articles is an extraordinary film I just watched on al-Jazeera English about Nigeria's sprawling capital Lagos. If you want to see what life is like for much of the world, watch this twenty-five minute film: