The object of the article is to point to some which different theories of memory can offer to political analysis. Firstly some characteristics of collective memory are developed. Then the same theoretic resources are used to approach phenomena produced in the political field. Last, social traumas and the need to install and including social pact are dealt with. What is shown is how social breakup lies on the inevitable that dynamics of identity constantly produce “Others” in the search for one meaning which groups a powerful “Us”. The role of different types of language is pointed out so that interests are dealt with and values are promoted, thus preparing a new cycle of interpretations and discussions to come that will “narrate” the new constitutive pact.