economy was highly regulated and an extensive welfare state was developed. From the 1950s Māori began moving to the cities in large numbers, and Māori culture underwent a renaissance. This led to the development of a Māori protest movement which in turn led to greater recognition of the Treaty of Waitangi in the late 20th century. The country's economy suffered in the aftermath of the 1973 global energy crisis, the loss of New Zealand's biggest export market upon Britain's entry to the European Economic Community, and rampant inflation. In 1984, the Fourth Labour Government was elected amid a constitutional and economic crisis. The interventionist policies of the Third National Government were replaced by "Rogernomics", a commitment to a free market economy. Foreign policy after 1984 became more independent especially in pushing for a nuclear-free zone. Subsequent governments have generally maintained these policies, although tempering the free market ethos somewhat. Māori arrival and settlement New Zealand was first settled by Polynesians from Eastern Polynesia. Genetic and archaeological evidence suggests that humans emigrated from Taiwan via southeast Asia to Melanesia and then radiated eastwards into the Pacific in pulses and waves of discovery which gradually colonised islands from Samoa and Tonga all the way to Hawaii, the Marquesas, Easter Island, the Society Islands and, finally, New Zealand. In New Zealand there are no human artifacts or remains dating earlier than the Kaharoa Tephra, a layer of volcanic debris deposited by the Mount Tarawera eruption around 1314 CE. The 1999 dating of some kiore (Polynesian rat) bones to as early as 100 CE was later found to be an error; new samples of rat bone (and also of rat-gnawed shells and woody seed cases) mostly gave dates later than the Tarawera eruption with only three samples giving slightly earlier dates. Pollen evidence of widespread forest fires a decade or two before the eruptions has been interpreted by some scientists as a possible sign of human presence, leading to a suggested first settlement period of 1280–1320 CE. However, the most recent synthesis of archaeological and genetic evidence concludes that, whether or not some settlers arrived before the Tarawera eruption, the main settlement period was in the decades after it, somewhere between 1320 and 1350 CE, possibly involving a coordinated mass migration. This scenario is also supported by a much debated, and now largely ignored, third line of evidence – traditional genealogies which point to