Rozin, P. (2005). The meaning of food in our lives: a cross-cultural perspective on eating and well-being. Journal of nutrition education and behavior, 37, S107-S112.
Humans are biologically adapted to their ancestral food environment in which foods were dispersed and energy expenditure was required to obtain them. The modern developed world has a surplus of very accessible, inexpensive food. Amid the enormous variety of different foods are “super” foods, such as chocolate, which are particularly appealing and calorie dense. Energy output can be minimal to obtain large amounts of food. ...