Fig. S1.

Daily life scenes and customs in the Trobriand Islands. (A) An elder from Bulakwa village (Kaileuna Island) showing how to till the soil before planting yams (sopu). (B) Traditional huts in Kaulaka village (Vakuta Island). (C) Pupils performing traditional dances (keywosi) as part of school activities (Kiriwina Island). (D) Distribution of goods (sagali) in Kaduwaga (Kaileuna Island) a year after the funeral of Kaileuna’s paramount chief. (E) Traditional table carving in Bwetalu village (Kiriwina Island). (F) The first coauthor (C.C.) on his hut’s veranda (kaukweda) in Kapisila village (Kaileuna Island) during an interview with the director of Kaisiga elementary school—Moses Moyobova—and his wife.