A brief history of lost civilizations

[oreilly]

http://floobynooby.blogspot.com/2011/03/10-civilizations-that-mysteriously.html

[drallison]

If you enjoyed this article, you might want to look into the work of Joseph Tainter (http://en.wikipedia.org/wiki/Joseph_Tainter) and read his book, The Collapse of Complex Societies, http://www.amazon.com/Collapse-Complex-Societies-Studies-Arc....