Chapter 01 · c. 50,000 BCE – 1500 CE
Deep past: settlement and the world's first farmers
People reached New Guinea around 50,000 years ago, and in the highland swamp of Kuk their descendants invented agriculture independently — one of only a handful of places on Earth where farming arose on its own.
Modern humans reached New Guinea at least 50,000 years ago, crossing from Southeast Asia during the last ice age when lower sea levels joined New Guinea, Australia, and Tasmania into a single continent known as Sahul. Reaching it still required open-water voyages, making these among the earliest sea crossings in human history. The settlers spread across coast, lowland swamp, and rugged interior, and over tens of thousands of years gave rise to the deeply rooted Papuan peoples — descendants of that first Australoid migration — long before later Austronesian seafarers added their languages and crops to the coasts and islands.
In the Wahgi Valley of the western highlands, at a swampy site called Kuk, these communities did something extraordinary: they began to farm. Archaeology at Kuk records the gradual shift from exploiting wild taro and yam on wetland margins around 7,000 years ago to deliberately draining ground with man-made ditches and cultivating bananas some 4,000 years ago. Worked almost continuously for 7,000 and possibly 10,000 years, Kuk is one of the very few places where agriculture was invented independently, with no influence from outside — making New Guineans among the world's earliest farmers.
From this agricultural base grew the dense, fragmented societies that still define the country. Sweet potato, arriving in later centuries, allowed highland populations to expand into one of the most thickly settled non-urban regions on Earth. Sharp mountains, deep valleys, and broad swamps kept communities apart, and over millennia this isolation produced more than 800 distinct languages — the greatest linguistic diversity of any country in the world — alongside elaborate exchange networks, ceremonial cycles, and the art of carving, painting, and feather adornment for which New Guinea is renowned.
“Kuk is one of the few places on Earth where farming was invented from scratch — New Guineans are among the world's earliest agriculturists.”
— UNESCO World Heritage Centre
Turning points
- c. 50,000 years agoPeoples & Migration
First settlement of New Guinea
People crossed from Southeast Asia to the joined landmass of Sahul, settling New Guinea in some of the earliest sea voyages and beginning one of the longest continuous human occupations on Earth.
See the data - c. 7,000–10,000 years agoEconomy & Trade
Independent invention of agriculture at Kuk
In the highland swamp of Kuk, communities drained wetlands to cultivate taro and bananas, one of only a few places on Earth where farming arose independently — recognised by UNESCO as a World Heritage Site.
See the data - before European contactCulture & Ideas
Chapter sources: Papua New Guinea, Papua New Guinea — History, Kuk Early Agricultural Site — World Heritage List, Kuk Early Agricultural Site, Papua New Guinea — Languages
Chapter 02 · 1500s – 1914
European contact and colonial partition
Traders, missionaries, and labour recruiters opened the coasts to the wider world in the nineteenth century, and in 1884 the island was carved between a German north and a British south.
European mariners sighted New Guinea from the sixteenth century, and Portuguese and Spanish navigators gave the island its lasting name — a comparison of its dark-skinned peoples to the Guinea coast of Africa. For centuries, however, the great island's malaria, dense forest, and reputation for danger kept outsiders to its fringes. Only in the nineteenth century did sustained contact begin, as whalers, beche-de-mer and pearl-shell traders, naturalists hunting bird-of-paradise plumes for the European millinery trade, and Christian missionaries pressed onto the coasts and islands, while labour recruiters — some of them 'blackbirders' who coerced or kidnapped islanders — drew Melanesian workers to plantations in Queensland and Fiji.
Imperial competition then partitioned the eastern half of the island within a few years. In November 1884 Germany proclaimed a protectorate over the north-east, soon administered as German New Guinea by the chartered Neuguinea-Kompanie and, from 1899, directly by the Reich; in the same month Britain declared a protectorate over the southern coast, called British New Guinea, which it annexed outright in 1888. The Dutch already held the western half of the island. The new colonial powers established plantations, mission stations, and administrative posts, but their reach extended little beyond the coasts and navigable rivers.
Australia, newly federated in 1901, took growing responsibility for the British south. Under the Papua Act of 1905 British New Guinea became the Australian Territory of Papua, and formal Australian administration began in 1906, much of it associated with the long governorship of Hubert Murray. Across the colonial sphere of the period, vast interior highlands remained entirely unknown to Europeans, their dense farming populations unsuspected — one of the largest blocks of inhabited country anywhere on Earth still beyond outside contact as the First World War approached.
“As the First World War approached, the densely farmed highlands remained one of the largest inhabited regions on Earth entirely unknown to the outside world.”
Turning points
- 19th centuryColonisation
Traders, missionaries, and labour recruiters arrive
Whalers, plume hunters, and beche-de-mer traders worked the coasts, missionaries founded stations, and labour recruiters — including coercive 'blackbirders' — drew Melanesian workers to plantations in Queensland and Fiji.
See the data - November 1884Colonisation
The island is partitioned
Germany proclaimed a protectorate over the north-east (German New Guinea) and Britain over the southern coast (British New Guinea) within days of each other, splitting eastern New Guinea between two empires.
See the data - 1906Colonisation
Australia takes over Papua
Following the Papua Act of 1905, British New Guinea became the Australian Territory of Papua, and formal Australian administration began in 1906.
See the data
Chapter sources: Papua New Guinea — History, Papua New Guinea — The colonial period, British New Guinea and German New Guinea, Papua New Guinea: forty years of independence, Administration of Papua
Chapter 03 · 1914 – 1942
Australian rule and the highland 'first contact'
Australia seized German New Guinea in 1914 and held it under a League of Nations mandate, and in the 1930s prospectors walked into the highlands to meet a million people the outside world had never known.
When the First World War broke out, Australian forces quickly occupied German New Guinea in September 1914, ending German rule in the Pacific. After the war the League of Nations granted Australia a Class C mandate over the former German territory, formally the Territory of New Guinea, from 1921, administered from Rabaul. Australia now governed both halves of the eastern island — the Territory of Papua in the south as its own possession and the Territory of New Guinea in the north under international mandate — though the two were kept under separate administrations and laws.
The most dramatic encounter of the period came in the interior. Searching for gold, the Australian prospectors Michael Leahy and his brothers, with the patrol officer James Taylor, walked into the central highlands in the early 1930s and found broad, intensively gardened valleys supporting perhaps a million people — societies that had farmed the same ground for thousands of years yet had no idea the wider world existed, and whom that world had never suspected. This celebrated 'first contact' was among the last times in modern history that so large a population met industrial civilisation for the first time, a meeting recorded in photographs and film.
Colonial development between the wars remained shallow and uneven. Plantations of copra and later gold mining at Bulolo brought cash economies to parts of the coast and goldfields, mission churches spread widely, and a thin network of patrol officers extended government control valley by valley. But health, schooling, and infrastructure barely reached most communities, and the great majority of New Guineans still lived by the gardening, exchange, and ceremony their ancestors had practised — a world about to be shattered by the arrival of a far more violent outside force.
“In the 1930s prospectors walked into the highlands and met a million people who had farmed the same valleys for millennia — and whom the world had never known.”
Turning points
- September 1914War & Rupture
Australia occupies German New Guinea
At the outbreak of the First World War, Australian forces seized German New Guinea, ending German colonial rule in the region.
See the data - 1921Politics & Power
- early 1930sPeoples & Migration
First contact in the highlands
Australian prospectors and patrol officers walked into the central highlands and found densely populated farming valleys — perhaps a million people — entirely unknown to the outside world until then.
See the data
Chapter sources: Papua New Guinea — The colonial period, British New Guinea and German New Guinea, Class C mandate, Papua New Guinea — History, Papua New Guinea
Chapter 04 · 1942 – 1945
The Second World War: Kokoda and Bougainville
Japan's drive toward Australia turned New Guinea into a vast battlefield; the Kokoda Track became the scene of some of the hardest fighting of the war, alongside Papuan soldiers and carriers.
After Japanese forces swept across the Pacific in early 1942 and captured Rabaul, New Guinea became a critical front in the war against Japan. Having failed to take the territory's capital, Port Moresby, by sea, the Japanese landed near Gona on the north coast on 21 July 1942 and pushed overland across the towering Owen Stanley Range along a narrow jungle footpath — the Kokoda Track. Raw Australian militiamen of the 39th Battalion and soldiers of the Papuan Infantry Battalion met them first and were driven back through Kokoda village, fighting a desperate delaying action in steep terrain, soaking rain, and disease.
Between 21 July and 16 November 1942 the Australians halted the Japanese advance within sight of Port Moresby and then forced them back over the mountains to the coast. The Kokoda campaign was arguably Australia's most significant of the war: more Australians died in the seven months of fighting in Papua than in any other campaign, with over 600 killed and some 1,680 wounded on the Track alone. Papuan carriers — remembered in Australian memory as the 'fuzzy wuzzy angels' — bore supplies and the wounded across the range, and Papuan soldiers fought alongside the Australians throughout.
The war ground on across the territory for three more years. From November 1944 Australian forces relieved American troops on Bougainville and waged a long 'hard slog' of patrols and small, fierce actions; more than 30,000 Australians served there, of whom over 500 were killed, against a Japanese garrison that finally surrendered on the island in August 1945. The fighting devastated towns, gardens, and villages, killed many New Guineans, and left a generation of survivors who had seen the outside world's industrial violence at first hand — an experience that fed rising expectations of change after the war.
“More Australians died in the seven months of fighting in Papua than in any other campaign — and the Japanese came closer to Australia than anywhere else.”
— Australian War Memorial
Turning points
- 21 July – 16 November 1942War & Rupture
The Kokoda Track campaign
Australian and Papuan troops halted the Japanese advance over the Owen Stanley Range toward Port Moresby and drove them back; over 600 Australians were killed in arguably Australia's most significant campaign of the war.
See the data - 1942–1945War & Rupture
Papuan carriers and soldiers
Papuan carriers moved supplies and the wounded across the mountains, and soldiers of the Papuan Infantry Battalion fought alongside Australian forces throughout the New Guinea campaigns.
See the data - November 1944 – August 1945War & Rupture
The Bougainville campaign
More than 30,000 Australians fought a long campaign of patrols and small actions on Bougainville, with over 500 killed, until the Japanese garrison surrendered in August 1945.
See the data
Chapter sources: Kokoda, Australians in the Kokoda Track Campaign, 21 July to 16 November 1942, Bougainville's Hard Slog (1944–45 campaign)
Chapter 05 · 1945 – 1975
Self-government and independence
After the war Australia merged Papua and New Guinea and, under United Nations pressure to decolonise, guided the joined territory to self-government and, on 16 September 1975, to independence under Michael Somare.
After 1945 Australia combined its administration of Papua and the former mandate into a single Territory of Papua and New Guinea, governed from Port Moresby, with the northern half now held as a United Nations trust territory. Through the 1950s and 1960s Australia expanded roads, schools, health services, and plantation and mining economies, and slowly began preparing the territory for self-rule under growing pressure from the United Nations to decolonise. A House of Assembly with elected New Guinean members was established in 1964, giving the country's many peoples their first shared political forum.
Decolonisation accelerated as a generation of educated New Guineans entered politics. Michael Somare, a former teacher and broadcaster from the Sepik, founded the Pangu Pati and emerged as the leading nationalist voice, arguing that the country's hundreds of peoples could and should govern themselves as one nation. Papua New Guinea moved to internal self-government on 1 December 1973, with Somare as chief minister, and adopted a home-grown constitution. The transition was remarkably peaceful, achieved through negotiation rather than armed struggle.
On 16 September 1975 the Australian flag was lowered in Port Moresby and Papua New Guinea became an independent state, with Somare as its first prime minister and Queen Elizabeth II as head of state represented by a New Guinean governor-general. Prince Charles attended on the Queen's behalf, and countries including the United States recognised the new nation that day. The young state inherited extraordinary diversity, a fragile economy heavily dependent on the giant Panguna copper mine on Bougainville, and the daunting task of welding more than 800 language groups into a single democracy.
“On 16 September 1975 the Australian flag came down in Port Moresby and a nation of more than 800 languages set out to govern itself as one.”
Turning points
- 1945Politics & Power
- 1 December 1973Politics & Power
- 16 September 1975Independence
Independence
Papua New Guinea became an independent nation under Prime Minister Michael Somare; Australia transferred sovereignty and the United States recognised the new state the same day.
See the data
Figures of the era
Chapter sources: Papua New Guinea — The colonial period, Independence of Papua New Guinea, Papua New Guinea — History, A Guide to the United States' History of Recognition: Papua New Guinea
Chapter 06 · 1975 – present
Bougainville and modern Papua New Guinea
A decade-long secessionist war on Bougainville tested the young nation; a 2001 peace deal and a 2019 independence vote left its future open, even as resource wealth and deep diversity define modern Papua New Guinea.
The independent nation's hardest test came on Bougainville, home to the vast Panguna copper mine whose revenues underpinned the national economy. Grievances over land, the unequal sharing of mining wealth, and severe environmental damage boiled over in 1988 when landowner and secessionist leader Francis Ona led sabotage that forced the mine's closure. The Bougainville conflict that followed, from 1988 to 1998, was the most violent in the Pacific since the Second World War, fought between Bougainvillean rebels and the Papua New Guinea Defence Force; estimates of the death toll vary widely, commonly cited in the range of around 10,000 to 20,000, and should be treated as estimates rather than precise figures.
The war ended through negotiation rather than outright victory. A 1998 ceasefire was followed by a comprehensive peace agreement in 2001 that created the Autonomous Region of Bougainville and promised a future referendum on the island's political status. That vote was held from 23 November to 7 December 2019, when Bougainvilleans voted overwhelmingly — by about 98 per cent — for independence over greater autonomy. The result is non-binding: under the peace agreement the outcome must be negotiated between the two governments and ratified by Papua New Guinea's national parliament, which had not done so as the question remained unresolved into the 2020s.
Beyond Bougainville, modern Papua New Guinea is a young, fast-growing democracy of striking contrasts. It holds great natural wealth — gold, copper, and large reserves of natural gas exported as LNG — yet most of its people still live by subsistence gardening in rural villages, and the country wrestles with rugged terrain, uneven development, and tribal and law-and-order challenges. Its more than 800 languages and thousand-plus communities, bound together largely by the lingua franca Tok Pisin, make it one of the most culturally diverse nations on Earth — a state barely two generations old, built on one of humanity's oldest inhabited landscapes.
“A nation barely two generations old, built on one of the oldest inhabited landscapes on Earth, and home to more languages than any other country.”
Turning points
- 1988–1998War & Rupture
The Bougainville conflict
A secessionist war over the Panguna mine, land, and environmental damage pitted Bougainvillean rebels against the PNG Defence Force; death-toll estimates range widely, commonly cited at roughly 10,000–20,000 and treated as estimates.
See the data - 2001Politics & Power
- 23 November – 7 December 2019Politics & Power
Figures of the era
Chapter sources: Bougainville: the conflict in focus, Bougainville, The Bougainville referendum and beyond, Bougainville votes overwhelmingly for independence from Papua New Guinea, Papua New Guinea