General IntroductionThe Geographical and Cultural Setting, The Linguistic Setting: The Eri (Amanab), Transcription of Amanab Terms Part I: Social Groups: Structures, Dynamics and Representations 1 Society and Local Groups 2 Dual Organization 3 From Dualism to Patrilineal Units 4 Household and Family Part II: Social Relations and Symbolic Function in Yafar Social Economy 5 Territory and Land Horticulture-Arboriculture 7 Foraging and Husbandry 8 Exchange and Circulation of Goods Among the Eri, Part III: Sexuality, Symbolic Reproduction and Social Continuity 9 Sexuality, Procreation and Powers 10 Alliance Structures and Matrimonial Behaviours 11 Kinship and its Representations 12 Individual Identity and Social Ontogeny 13 Hidden Powers From Religious Office to Political Authority14 Bad Magic, Bow or Fighting Stick, Part IV: Fracture and Change 15 Contact: Colonization, Independence and Identity