Abstract EN:

This thesis was written in the framework of french theories especially mauss'and dumont" it is concerned with the totality of society which takes the form of a hierarchy of vallues, dealing with encompassments, hierarchical oppositions, chaque of level and inversions. Brother-sister relation is dominant both when expressed in terms of same sexe (eb-yb; ez-yz) and in terms of opposite sexe (b and z), in the first case, eb encompasses the others, while in the second, b represents the totality. Intermariage shows that bz relation becomes a crossing of relations and mouvements which composes kinship and society. Thoughter mariage, a sister leaves her brother's group : she is a "true" in her husband's house ; meanwhile she is an "outsider" in her father's house, through his mariage, a brother is classified as an "outsideer" in his wb's house; meanwhile he is a "true" in his father's house. It means that bz relation is both structured by separation and union. The rituals use the same kinship classes and structures to establish the relation between the living and the dead, the "true" class represents the totality and brings offerings to the dead while the class "outsider" prepares the ritual, rithual in general. And mariage in particular show that bz are separated by mariage and unified by ritual in order to reconfirm the totality of the society. "outsider's" and "true's" ritual services give meaning to the bz relation as a crossing and a locus inthe nuculu's ideology, they are at a crossing-point between the vertical father's line which transfers the group's name and the oblique mb's line which transfers the ancestral life, defined as ancestrality (totality). The durability of ancestrality is based on two major services : "killi ng" , as the oh's service, and "child bearing", as sw's service. This durability is activated by the an