Chapter 15 of the series 18 decades of life in Mexico in the twentieth century. Images of the cultural, social and political life in Mexico from 1970 to 1974. During the presidential term of Luis Echeverria Alvarez fantasies of prosperous and modern country it dissolves; Mexico live in political crisis. It is a time of omnipotence, barbarism, and violence intervention: the world seeks new ways. In Mexico, it held the World Cup, unionism is strengthened and inflation responds to the continuing economic imbalances.

Dominique, Suzanne, and Annette: three women who participated in the adventure of the Medvedkine groups (Besançon, Sochaux, 1967-1974). In those same years, the lives of our grandmothers and mothers experienced decisive changes: they worked outside the home and revolutionized customs. A group of Besançon students are investigating those events and questioning their own family memory.

The story of union branch no. 100. The dismissal of a worker in a factory shows his colleagues the instability of their situation. From the discussion that followed this event germinated the idea of ​​a union. A national union is consulted, which appoints a representative to explain the advantages and operation of a workers' union. Branch No. 100 is created and immediately becomes a trading agency; subsequently, it obtains better working conditions for the workers. The spirit that presides over all the meetings demonstrates the democratic strength of a union.