I'm curious that the authors missed one basic explanation: food scarcity will force people into terrible decisions for survival. Maybe that measure is a gradien

I'm curious that the authors missed one basic explanation: food scarcity will force people into terrible decisions for survival. Maybe that measure is a gradient, not binary - the less food you have the more likely you are needing to steal or otherwise supplement income to feed yourself. It's not the 'well fed' stabbing you in the alley for your wallet.