Mean Genes is a good look into evolutionary psychology: http://www.amazon.com/Mean-Genes-Taming-Primal-Instincts/dp/0465031242/ref=sr_1_1?s=books&ie=UTF8&qid=13

Mean Genes is a good look into evolutionary psychology: http://www.amazon.com/Mean-Genes-Taming-Primal-Instincts/dp/0465031242/ref=sr_1_1?s=books&ie=UTF8&qid=1361194025&sr=1-1&keywords=mean+genes http://www.amazon.com/Mean-Genes-Taming-Primal-Instincts/dp/... Basically, our brains are hard wired for this type of consumption. A good explanation for why so many are fat and broke.