The Food Bubble (2010)
It is a bit disconcerting to me that commenters here are fascinated by the technical analysis of this system and appear quite oblivious to the problem of starving human beings.Perhaps I am not intellectual enough to appreciate the empathy hiding behind this analytical ruminating about the problem - but I wish that I got the impression that there was more reaction happening than "Wow, what an interesting phenomenon in the commodities market- how do all of these moving pieces fit together?"To quote the sometimes poignant Jack Johnson: 
"Why don't the newscasters cry when they read about people who die?
At least they could be decent enough to put just a tear in their eyes"