Food price spikes in 2007-2008 and 2010-2011 triggered food riots across the world - including the Arab Spring. NECSI quantified the heightened propensity for violence, unrest and revolution during times of high food prices. NECSI predicted another price bubble and corresponding surge in violence by the end of this year, but the worst U.S. drought in half a century has accelerated this process. Yaneer Bar-Yam presents NECSI's findings linking high food prices and unrest, and outline the significant causes of a decade-long price run-up: excessive financial speculation and the large-scale conversion of corn to ethanol. The work described was done in collaboration with Marco Lagi, Karla Z. Bertrand, Yavni Bar-Yam, Dominic K. Albino, and Greg Lindsay.