In English
Well! (ego) is the cause. The narrow limited self, the ego, is at the root of the evil. Probing the problem a little deeper, I would say that the nature of the food relished is primarily responsible. Food is of three qualities Sathwik, Rajasik, and Thamasik (leading to purity, passion and inertia). Some consume Sathwik-Rajasik or Thamasik-Rajasik food, or they change from one type to another, for better or worse. Since food alleviates or arouses, prevents or promotes emotions and passions, it moulds the behaviour, conduct and attitudes of men.