The article reviews the usefulness of the historical–anthropological models of peasantry and Germanic Mode of Production applied to the analysis of the Castro culture (Cultura Castrexa, the Iron Age of the north-western Iberian Peninsula). A historical reconstruction of the period is developed, in which the strain between local community and familial units constitutes one of the most important agents in the process of change, according to a discourse largely based on the proposals of P. Clastres on ‘societies against the state’. A relevant role is given to different forms of violence and conflict; initially they are understood as active mechanisms in inter-community relations although later they would rather become virtual and latent elements that allow the development of a model of social relations that can be defined as a non-class ‘heroic society’.