According to some analysts who arguably sort-of predicted the Arab spring, there will be widespread global riots next year, writes Brian Merchant:

• Statistics show that the single greatest driving factor in creating unrest and riots is hunger. The higher the food price, the greater the likelihood of riots.
• A food price index of around 220 seems to just about guarantee riots. So far this year the world has hovered within the 210-216 range – perilously close to disaster.
• But food prices are expected to continue to rise, and the experts predict that in August 2013 the probability of riots will be extremely high.

Read more about the methodology of the study and see an excellent visualization of the relationship over here.

Source: Mother Board