Being overweight or obese is often associated with being lazy or greedy. However, this is a very misleading thought. What is more important is the type of food we are eating and in this day and age, energy dense or high calorie foods are becoming more available and advertised heavily to the mass markets. But why are they so popular?
It is the food industry taking advantage of the thrifty gene. When our ancestors were living in caves the thrifty gene was useful and helped store fatty food when available. The fat stores helped you survive a famine. The thrifty gene does not know that there is no more famine, at least in the developed world.
Thanks to the food industry f