I fear this will lead to events of either a global war or a general destabilization. The first no comment needed. In a completely destabilized state there will be no way that the services needed for common thing that we take as granted wont be available. Water food will be the main concern. And this of course will imply much more in the big cities. Also the climate seems to change. More dryness. We are already 7 bn and there is a main issue of the food shortage. I was reading a report this summer from an English university (cannt recall which one) that was mentioning that at the August of 2013 we will live serious upset cause of food shortage. Same report from the UN. Also serious loss the last years in farming production of basic things like wheat and corn. If you see the graphs of population Vs food supplies we are now producing less than we need. I think oil and other things are just the coverage of the main problem.