From Simon Black at Business Insider:
The researchers’ analysis went a step further, though; they modeled the relationship between food prices and social unrest to reach a simple conclusion– whenever the UN Food and Agricultural Organization (FAO)’s global food price index climbs above 210, conditions ripen for social unrest.
We’re currently at 213. Read the whole thing, including Black’s exhortation to get a garden, at least. Not that that’s news if you read here regularly.