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Polynesian culture is the culture of the indigenous peoples of Polynesia who share common traits in language, customs and society. Sequentially, the development of Polynesian culture can be divided into four different historical eras:
- Exploration and settlement (c. 1800 BC – c. AD 700)
- Development in isolation (c. 700 – 1595)
- European encounter and colonization until World War II (1595–1946)
- Modern times/After World War II
Maternal mitochondrial DNA analysis suggests that Polynesians, including Samoans, Tongans, Niueans, Cook Islanders, Tahitians, Hawaiians, Marquesans and Māori, are genetically linked to indigenous peoples of parts of Maritime Southeast Asia including those of Taiwanese aborigines. This DNA evidence is supported by linguistic and archaeological evidence.  Recent studies into paternal Y chromosome analysis shows that Polynesians are also genetically linked to peoples of Melanesia. 
Between about 2000 and 1000 BC speakers of Austronesian languages spread through Maritime South-East Asia – almost certainly starting out from Taiwan  – into the edges of western Micronesia and on into Melanesia. In the archaeological record there are well-defined traces of this expansion which allow the path it took to be followed and dated with a degree of certainty. In the mid-2nd millennium BC a distinctive culture appeared suddenly in north-west Melanesia, in the Bismarck Archipelago, the chain of islands forming a great arc from New Britain to the Admiralty Islands. This culture, known as Lapita, stands out in the Melanesian archeological record, with its large permanent villages on beach terraces along the coasts. Particularly characteristic of the Lapita culture is the making of pottery, including a great many vessels of varied shapes, some distinguished by fine patterns and motifs pressed into the clay. Within a mere three or four centuries between about 1300 and 900 BC, the Lapita culture spread 6000 km further to the east from the Bismarck Archipelago, until it reached as far as Samoa and Tonga. In this region, the distinctive Polynesian culture developed.
The Proto-Polynesians who find their origins in Maritime Southeast Asia were an adventurous seafaring people with highly developed navigation skills. They perfected their seafaring and boat-craft techniques as each successive generations "island-hopped", starting from the island of Taiwan through the Philippine and Indonesian archipelagos and west to the Marianas, finally dispersing throughout the Pacific Ocean. They colonised previously unsettled islands by making very long canoe voyages, in some cases against the prevailing winds and tides. Polynesian navigators steered by the sun and the stars, and by careful observations of cloud reflections and bird flight patterns, were able to determine the existence and location of islands. The name given to a star or constellation taken as a mark to steer by was kaweinga. The discovery of new islands and island groups was by means of entire small villages called vanua or "banwa" setting sail on great single and double-hulled canoes. Archaeological evidence indicates that by about 1280 AD, these voyagers had settled the vast Polynesian triangle with its northern corner at Hawaii, the eastern corner at Rapa Nui (Easter Island), and lastly the southern corner in New Zealand.  By comparison, Viking navigators first settled Iceland around 875 AD. There have been suggestions that Polynesian voyagers reached the South American mainland. Carbon-dating of chicken bones found by Chilean archaeologists on the Arauco Peninsula in south-central Chile was thought to date from between 1321 and 1407 AD. This initial report suggested a Polynesian pre-Columbian origin. However, a later report looking at the same specimens concluded:
A published, apparently pre-Columbian, Chilean specimen and six pre-European Polynesian specimens also cluster with the same European/Indian subcontinental/Southeast Asian sequences, providing no support for a Polynesian introduction of chickens to South America. In contrast, sequences from two archaeological sites on Easter Island group with an uncommon haplogroup from Indonesia, Japan, and China and may represent a genetic signature of an early Polynesian dispersal. Modeling of the potential marine carbon contribution to the Chilean archaeological specimen casts further doubt on claims for pre-Columbian chickens, and definitive proof will require further analyses of ancient DNA sequences and radiocarbon and stable isotope data from archaeological excavations within both Chile and Polynesia. 
The cultivation before western exploration by many Polynesian cultures of the sweet potato, a South American plant, is also evidence for contact. Sweet potato has been radiocarbon-dated in the Cook Islands to 1000 AD, and current thinking is that it was brought to central Polynesia around 700 AD, possibly by Polynesians who had traveled to South America and back, and spread across Polynesia to Hawaii and New Zealand from there.  
While the early Polynesians were skilled navigators, most evidence indicates that their primary exploratory motivation was to ease the demands of burgeoning populations. Polynesian mythology does not speak of explorers bent on conquest of new territories, but rather of heroic discoverers of new lands for the benefit of those who voyaged with them.
While further influxes of immigrants from other Polynesian islands sometimes augmented the growth and development of the local population, for the most part, each island or island group's culture developed in isolation. There was no widespread inter-island group communication, nor is there much indication during this period of any interest in such communications, at least not for economic reasons. However, almost all these isolated colonies originating from Maritime Southeast Asia still retained the strong influence of their ancestral culture. These are very obvious in social hierarchies, language, and technology which point to a common source with the Dayaks, Tao, Ifugao, and Bajau.
During the period following complete settlement of Polynesia, each local population developed politically in diverse ways, from fully developed kingdoms in some islands and island groups, to constantly warring tribes or extended family groups between various sections of islands, or in some cases, even within the same valleys on various islands.
While it is likely that population pressures caused tensions between various groups, the primary force that seems to have driven unity or division among tribes and family groups is geophysical: on low islands, where communications are essentially unimpeded, there does not appear to have developed any widely observable incidence of conflict.
Meanwhile, on most high islands, there were, historically, warring groups inhabiting various districts, usually delimited primarily by mountain ridges, with carefully drawn lowland boundaries. Early on, however, many such islands developed a united social and political structure, usually under the leadership of a strong monarch. An example is the Marquesas Islands, which, unlike other high-island groups in Polynesia, are not surrounded by fringing coral reefs, and consequently have no low coastal plains. Every valley in the Marquesas is accessible to other valleys only via boat, or by traveling over steep mountain ridges.
The varieties of dance from the islands of Polynesia are known to be simple.
Because of the paucity of mineral or gemological resources, the exploration of Polynesia by European navigators (whose primary interest was economic), was of little more than passing interest. The great navigator Captain James Cook was the first to attempt to explore as much of Polynesia as possible.
Following the initial European contacts with Polynesia, a great number of changes occurred within Polynesian culture, mostly as a result of colonization by European powers, the introduction of a large number of alien diseases to which the Polynesians had no immunity, slaving ventures to supply plantations in South America, and an influx of Christian missionaries, many of whom regarded the Polynesians as descendants of the lost tribes of Israel. In many cases, colonizing powers, usually under pressure from missionary elements, forcibly suppressed native cultural expression, including the use of the native Polynesian languages.
By the early 20th century, almost all of Polynesia was colonized or occupied to various degrees by Western colonial powers, as follows:
- the United Kingdom
- United States
All of the Polynesian outliers were subsumed into the sometimes-overlapping territorial claims of Japan, the United Kingdom and France.
During World War II, a number of Polynesian islands played critical roles. The critical attack that brought the United States into the war was the Japanese attack on Pearl Harbor, in south-central Oahu, Hawaii.
Following World War II, political change came more slowly to the islands of Polynesia than to the other parts of overseas colonies of European powers. Although sovereignty was granted by royal proclamation to New Zealand as early as 1907, this did not go into full effect until 1947.
Following in independence were the nations (and the sovereign powers from which they obtained complete political independence) of:
- Samoa, as "Western Samoa" (from New Zealand) in 1962
- Tuvalu (from the United Kingdom) in 1978
- the Phoenix Islands and most of the Line Islands as part of the republic of Kiribati (from the United Kingdom) in 1979
- Niue (from New Zealand) in 1974  
- Tonga was never actually a colony, but a limited protectorate of the United Kingdom. Tonga never relinquished internal self-government, but when external foreign affairs were again decided by Tongans without reference to the United Kingdom in 1970, Tonga was said to have rejoined the Comity of Nations. Tonga is the only island group in the South Pacific that was never colonised by a European power.
The remaining islands are still under official sovereignty of the following nations:
- Hawaii (United States)
- American Samoa (United States)
- Cook Islands (New Zealand)
- French Polynesia (France)
- Pitcairn (United Kingdom)
- Tokelau (New Zealand)
- Wallis and Futuna (France)
- Easter Island (Chile)
- Howland, Baker, Jarvis, and Palmyra Islands (United States)
The various outliers lie in the sovereign territory of the nations of Vanuatu, the Solomon Islands, Fiji, the Federated States of Micronesia, and the French territory of New Caledonia. Hawaii became a state of the United States, giving it equal political status to the other 49 states.
Independence and increasing autonomy is not the only influence affecting modern Polynesian society. The primary driving forces are, in fact, the ever-increasing accessibility of the islands to outside influences, through improved air communications as well as through vastly improved telecommunications capabilities. The economic importance of tourism has also had a tremendous impact on the direction of the development of the various island societies. Accessibility of outside sources, as well as the tourism viability of individual islands, has played an important role to which the modern culture has adapted itself to accommodate the interests of outsiders, as opposed to the influences of those intent upon promoting the retention of native traditions. Because of this, Polynesia is today an area in varying degrees of extreme cultural flux.
In the genetics of Polynesians today, the gene pool is mixed with many different peoples. Hawaii being the main example, had a high influx of Asians such as Filipinos, Koreans, Japanese, and Chinese during the late 19th century and into the 20th century for plantation work. It has thus led to pure Hawaiian-Polynesians being few and far between.
- W. Arthur Whistler. Plants of the Canoe People: An Ethnobotanical Voyage through Polynesia. Honolulu: University of Hawaii Press, 2009. ISBN 978-0-915809-00-4.
- For a discussion of the origins of Eastern Polynesians, particularly the Māori of New Zealand, see: Douglas G. Sutton, ed., The Origins of the First New Zealanders (Auckland, New Zealand: Auckland, 1994).
- M. Kayser, S. Brauer, G. Weiss, P.A. Underhill, L. Roewer, W. Schiefenhövel, and M. Stoneking, "Melanesian origin of Polynesian Y chromosomes," Current Biology, vol. 10, no. 20, pages 1237–1246 (19 Oct. 2000). See also correction in: Current Biology, vol. 11, no. 2, pages 141–142 (23 Jan. 2001).
- 20069298"Howe, K. R (2006). Vaka Moana: Voyages of the Ancestors - the discovery and settlement of the Pacific. Albany, Auckland: David Bateman. pp. 92–98.
- Indo-European and Asian origins for Chilean and Pacific chickens revealed by mtDNA. Jaime Gongora, Nicolas J. Rawlence, Victor A. Mobegi, Han Jianlin, Jose A. Alcalde, Jose T. Matus, Olivier Hanotte, Chris Moran, J. Austin, Sean Ulm, Atholl J. Anderson, Greger Larson and Alan Cooper, "Indo-European and Asian origins for Chilean and Pacific chickens revealed by mtDNA" PNAS July 29, 2008, vol. 105 no 30 
- VAN TILBURG, Jo Anne. 1994. Easter Island: Archaeology, Ecology and Culture. Washington D.C.: Smithsonian Institution Press
- "Gardening at the Edge: Documenting the Limits of Tropical Polynesian Kumara Horticulture in Southern New Zealand", University of Canterbury
- "Home". The Official Website Of Niue Tourism. Retrieved 6 April 2018.
- "Niue". New Zealand Post Stamps. Retrieved 6 April 2018.
Media related to Culture of Polynesia at Wikimedia Commons