What’s The Biggest Threat To Global Stability?

Food shortages?

Grain yields are beginning to hit a "glass ceiling" in many countries, [Lester Brown, founder of the Earth Policy Institute] said, where farmers have already taken advantage of what science has to offer for improving yield. As more and more countries hit an upper limit on productivity, the world grain harvest will begin to plateau, even as demand for food continues to rise, causing a rise in prices. More worrisome, the global food market is vulnerable to external shocks such as prolonged drought. “We don’t have idle land, we’re flat out,” says Brown. "We don’t have [food] stocks. We’re living harvest to harvest. The question becomes, what if we have a major shortfall in the world?"