The Bosavi people number about 2000 and live in tropical rainforest just north of Mount Bosavi, an extinct volcano on the Great Papuan Plateau, in the Southern Highlands of Papua New Guinea. The colonial Australian government made first contact here in1936, but it was not until 1957 that a first census was taken. The building of an airstrip in 1964, the arrival of resident Australian evangelical missionaries in 1970, an increased government presence in the 1980s, and the development of oil and logging projects in the surrounding region in the 1990s have all intensified pressures toward major social change