United States government discovered badly behave about less nutrition problem in their citizen, during second war world. The meaty problem that happen in citizen is the part of meal problem. So, to control it. The citizen must to trying another meal like vegetable and healthy food by import of food from another country. But, until this program it is over. Many inhabitant stilled in short of nourishment.
Finally, United States employed new scientist in anthropologist, Margaret Mead and social psychologist, Kurt Lewin. Mead and Lewin researched what the psychological conflict happen in US society. The result of research is the citizen branded as the meal of the poor and they don't belief about the way of prepare it. So, they conclude offal lost is stigma, and we need for nutrition support.
Now, based on the research many psychologist to develop the therapy model as psychology intervention to change the behavior of society. They believe WPI is the answer for food problem in citizen in US by alteration of the mental blocking.