This was predicted in the book, The Sovereign Individual. It’s a very interesting read. The authors, Davidson and Rees-Mogg, say that the large nation states will break up, and we may even see the return of political entities such as city-states. This will not happen without significant chaos.
We live in interesting times.
What did they base their prediction on?
If what Antony Watts says is true in this article
http://wattsupwiththat.com/2013/09/08/the-climate-grain-production-relationship-quantified/
I could see this as another factor in that occurring.