ensure a good yam harvest. The ritual is also now used to show acceptance into manhood. Land diving was first given international exposure when David Attenborough and a BBC film crew brought back footage of the ritual during the 1950s, which aired as part of The People of Paradise documentary series. Visitors to Pentecost who witnessed the ceremony include Pope John Paul II (1986) and Queen Elizabeth II (1974). The north Pentecost village of Laone was the home of Walter Lini, who led Vanuatu to independence in 1980. Today, the 'father of the nation' is commemorated by a statue at the nearby Lini Memorial College. The Turaga indigenous movement, which rejects the Western economic system and instead promotes an alternative based on the "kastom economy", began on Pentecost and is based at Lavatmanggemu in the north-east of the island. The practice of grade-taking (the elevation of social status through the slaughter of valuable pigs) has been studied by anthropologists. Population Traditionally, two tribes occupied Pentecost, the Tabi and the Bule, who intermarry and follow a matrilineal system of descent and inheritance. The island has a population of almost 17,000 at the 2009 census. Pentecost's population centres are concentrated along the west coast, although a number of people also live inland. Major settlements along the west coast include (from north to south): Laone, Abwatuntora, Loltong, Latano, Nambwarangiut, Namaram, Bwatnapni, Melsisi, Ranwadi, Waterfall (Vanuu), Baravet, Lonoror, Hotwata, Panas, Wali, Panngi and Ranputor. Away from the coast, there are major settlements at Nazareth and Atavtabangga in the north, and at Enaa, Wutsunmwel, Tanbok, Naruwa, Ubiku and Tansip in the centre of the island. Most of these places have village telephones and one or two inhabitants who own 'trucks' (four-wheel-drive vehicles) or 'speedboats' (small motorboats), which the villagers use for transport. A couple of these villages also have small banks and post offices. The east coast is wild and inaccessible, with large uninhabited areas, although people are moving into previously uninhabited areas as the island's population increases. Major villages on the eastern side of the island include Ranwas, Bunlap and Baie Barrier (Ranon) in the south-east, and Renbura and Vanrasini further north. Lifestyle and economy There are no real towns on Pentecost. Most islanders live in small rural villages, surviving by subsistence agriculture and growing cash crops. Taro, a root vegetable well-suited to Pentecost's wet climate, is the staple food. Manioc (cassava), yams, bananas,