Still, Mexico remained a predominantly rural country, being 67% of its population under 15 000 inhabitants. From 1955-1970, the industry grew more than 8% annually, leaving the farmer much lower growth. These two decades marked the final development country and the population of the metropolitan area of Mexico City was 3.2 million and for 1970 reached $ 9 million. Also, the cities of Guadalajara and Monterrey population tripled in volume, reaching 1.5 and 1.2 million correspondingly. While in 1950 the towns with more than 100 000 inhabitants were only fourteen in 1970 became 40. As Mexico had become a country unmistakably urban. Economic and Social internal migration process is directly related to the process of industrialization.

That's why since 1940 the urban structure was modified significantly. During the sixties and seventies the flow of people was enough. The big cities still have the capacity to receive people and continued favorable development for all. In the eighties, cities began to about populated, leading to a reduction in labor markets and a high saturation of the towns. Lost wages purchasing power.

What caused the big cities are no longer attractive to social mobility. The company was severely affected both economically and socially, and now living in a city of enormous magnitude. The services also became scarce. The former services previously provided the company with ease began to decline, for example, the IMSS or ISSTE were no longer the same, now had more people requiring these services and little ability to meet them.