Summary of introduction

Food is one of the most important aspects to understand people's culture and such a wide change of Americans diet must be analyzed.
The multi-million dollar fast food industry didn't change only because what people eat but also because of franchising .Cities started to look the same. McDonald's "M" became a symbol of United States almost like the red Cross for the Christianity.
The motivation for such a rapid growth is the fact that fast food industry was born in a critical moment for American economy, which made it necessary for women to start working. This meant less people cooking at home and a higher need of restaurants, which was a perfect ground for the growth of fast food industry.
What was new in this kind of franchising was the focus on efficiency- making more things in less time and money- which meant using new technologies about food engineering and employ less qualified people who needed low wages.
That's what's hidden behind the funny and pretty face of fast foods.