"Twice in the last five years, rising food prices triggered global waves of social unrest. With drought baking US crops, another round of soaring, society-straining price spikes may happen in coming months. According to researchers from the New England Complex Systems Institute (NECSI), commodity speculation — investors betting on food prices —will amplify the drought's market signals, creating a new food bubble and the crises that follow. 'The drought is clearly going to kick prices up. It already has. What happens when you have speculators is that it goes through the roof,' said NECSI president Yaneer Bar-Yam. 'We've created an unstable system. Globally, we are very vulnerable.'"