This research report describes a study of Marquesas Islanders and how they interact with each other at different life stages from childhood, through youth and adulthood. Fieldwork for this study was conducted for a 10-month period on the island of 'Ua Pou, Marquesas Islands, French Polynesia. A small community of about 200 people in a valley on the leeward side of the island served as the setting for this research. Both formal and informal observations of valley life provide the basis for the study of group interactions. These interactions are then linked to the range of Marquesan beliefs about how individuals should relate to the group. The observed differences across the lifespan that are described include: (1) patterns of social behavior; (2) rules underlying these patterns; and (3) concepts of how to relate to others underlying these patterns. Different life stages are characterized by different interaction patterns, rules, and concepts of human relations. (EH)