'In 2035, most of humanity will live in favelas. Many people will live in very poor housing, but it will have its good side. It will mean that cities will consist of series of small units organized, at best, by the people who know what is best for themselves and, at worst, by local crime bosses. Cities will be too big and complex for any single power to understand and manage them. The word "city" will lose some of its meaning: it will make less and less sense to describe agglomerations of tens of millions of people as if they were one place, with one identity.'
Indeed, less developed countries tend to urbanize very rapidly and a huge number of new urban dwellers end up in favelas or slums.
Moore, Rowan. (2011) The Guardian, [online], Available: http://www.guardian.co.uk/society/2011/jan/02/25-predictions-25-years [30 Jan 2013].