Social Organization. Trobrianders are divided between those bom into chiefly and commoner matrilineages. Chiefly matrilineages, ranked among themselves, own rights to special prerogatives surrounding food prohibitions and taboos that mark spatial and physical separation as well as rights to wear particular feather and shell decorations and to decorate houses with ancestral designs and cowrie shells. For all villagers including chiefs, the locus of social organization is the hamlet with networks of social relations through affinal and patrilateral ties to those living in other hamlets within the same village. Women and men also consider themselves kin to those whose ancestors came from the same place of origin. Traditionally, only members of chiefly lineages and their sons participated in kula, but now many more villagers (although by no means all) engage in kula. Chiefs remain the most important kula players.
Political Organization. Each ranking matrilineage is controlled by a chief but the highest-ranking chief is a member of the tabalu matrilineage and resides in Omarakana village. The most important chiefly prerogative is the entitlement to many wives. At least four of each wife's relatives make huge yam gardens for her and this is the way a chief achieves great power. But if a chief is weak, he will have difficulty finding women to marry. The villagers of all the islands elect councillors who are members of the Kiriwina Local Government Council. Chiefs sit at the Council of Chiefs, and the Omarakana chief presides over both councils. Chiefs' kula partners are the most important players in other kula communities, and chiefs have the potential to gain the highestranking shells.
Social Control. Disputes most often arise over land tenure, usually before the time of planting new yam gardens. Other causes of conflict concern cases of adultery, thefts, physical violence and, more rarely, sorcery accusations. The Council of Chiefs arbitrates most problems but some cases are referred to formal courts.
Conflict. Because of the many intermarriages that occur within a village, conflicts are quickly resolved by public debate. Warfare between village districts was a common occurrence prior to colonization. Such fighting, undertaken by chiefs, most often took place during the harvest season when political power or its absence was exposed. Today, fights sometimes erupt for the same reasons, but the presence of government officials usually holds these incidents in check. The most dangerous conflict is the traditional yam competition where the members of one matrilineage line up their largest and longest yams to be measured against the yams brought together by the members of a rival matrilineage. Lengthy speeches made by intervening kin or affines will Usually stop the competition from proceeding. Once a winner is declared, the losers become the most dangerous enemies of the winning matrilineage for generations.