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Human migration is the movement by people from one place to another with the intention of settling temporarily or permanently in the new location. The movement is typically over long distances and from one country to another, but internal migration is also possible. Migration may be individuals, family units or in large groups.〔(【引用サイトリンク】title= Migrations country wise )〕 Migration has continued under the form of both voluntary migration within one's region, country, or beyond and involuntary migration (which includes the slave trade, trafficking in human beings and ethnic cleansing). People who migrate into a territory are called immigrants, while at the departure point they are called emigrants. Small populations migrating to develop a territory considered void of settlement depending on historical setting, circumstances and perspective are referred to as settlers or colonists, while populations displaced by immigration and colonisation are called refugees. This article delineates the history of human migration, spanning from the pre-historic era to the late twentieth century. ==Pre-modern migrations== Historical migration of human populations begins with the movement of ''Homo erectus'' out of Africa across Eurasia about 1.75 million years ago. ''Homo sapiens'' appear to have occupied all of Africa about 150,000 years ago, moved out of Africa 70,000 years ago, and had spread across Australia, Asia and Europe by 40,000 years BCE. Migration to the Americas took place 20,000 to 15,000 years ago, and by 2,000 years ago, most of the Pacific Islands were colonised. Later population movements notably include the Neolithic Revolution, Indo-European expansion, and the Early Medieval Great Migrations including Turkic expansion. In some places, substantial cultural transformation occurred following the migration of relatively small elite populations, Turkey and Azerbaijan being such examples. In Britain, it is considered that the Roman and Norman conquests were similar examples, while "the most hotly debated of all the British cultural transitions is the role of migration in the relatively sudden and drastic change from Romano-Britain to Anglo-Saxon Britain", which may be explained by a possible "substantial migration of Anglo-Saxon Y chromosomes into Central England (contributing 50%–100% to the gene pool at that time.)" Early humans migrated due to many factors such as changing climate and landscape and inadequate food supply. The evidence indicates that the ancestors of the Austronesian peoples spread from the South Chinese mainland to Taiwan at some time around 8,000 years ago. Evidence from historical linguistics suggests that it is from this island that seafaring peoples migrated, perhaps in distinct waves separated by millennia, to the entire region encompassed by the Austronesian languages. It is believed that this migration began around 6,000 years ago.〔(Language trees support the express-train sequence of Austronesian expansion ), Nature〕 Indo-Aryan migration from the Indus Valley to the plain of the River Ganges in Northern India is presumed to have taken place in the Middle to Late Bronze Age, contemporary to the Late Harappan phase in India (ca. 1700 to 1300 BC). From 180 BC, a series of invasions from Central Asia followed, including those led by the Indo-Greeks, Indo-Scythians, Indo-Parthians and Kushans in the northwestern Indian subcontinent.〔(The appearance of Indo-Aryan speakers ), Encyclopædia Britannica〕〔(Genetic Evidence on the Origins of Indian Caste Populations -- Bamshad et al. 11 (6): 994 ), Genome Research〕 From 728 BC, the Greeks began 250 years of expansion, settling colonies in several places, including Sicily and Marseille. In Europe, two waves of migrations dominate demographic distributions, that of the Celtic people and that of the later Migration Period from the North and East, both being possible examples of general cultural change sparked by primarily elite and warrior migration. Other examples are small movements like that of the Magyars into Pannonia (modern-day Hungary). Turkic peoples spread from their homeland in modern Turkestan across most of Central Asia into Europe and the Middle East between the 6th and 11th centuries. Recent research suggests that Madagascar was uninhabited until Austronesian seafarers from Indonesia arrived during the 5th and 6th centuries AD. Subsequent migrations from both the Pacific and Africa further consolidated this original mixture, and Malagasy people emerged.〔(Malagasy languages ), Encyclopaedia Britannica〕 Before the expansion of the Bantu languages and their speakers, the southern half of Africa is believed to have been populated by Pygmies and Khoisan-speaking people, today occupying the arid regions around the Kalahari Desert and the forest of Central Africa. By about 1000 AD, Bantu migration had reached modern day Zimbabwe and South Africa. The Banu Hilal and Banu Ma'qil were a collection of Arab Bedouin tribes from the Arabian Peninsula who migrated westwards via Egypt between the 11th and 13th centuries. Their migration strongly contributed to the Arabisation and Islamisation of the western Maghreb, which was until then dominated by Berber tribes. Ostsiedlung was the medieval eastward migration and settlement of Germans. The 13th century was the time of the great Mongol and Turkic migrations across Eurasia.〔(Migrations-&-World History )〕 Between the 11th and 18th centuries, there were numerous migrations in Asia. The Vatsayan Priests from the eastern Himalaya hills, migrated to Kashmir during the Shan invasion in 1203C. They settled in the lower Shivalik hills in 1206C to sanctify the manifest goddess. In the Ming occupation, the Vietnamese expanded southward in a process known as nam tiến (southward expansion).〔(The Le Dynasty and Southward Expansion )〕 Manchuria was separated from China proper by the Inner Willow Palisade, which restricted the movement of the Han Chinese into Manchuria during the early Qing Dynasty, as the area was off-limits to the Han until the Qing started colonising the area with them later on in the dynasty's rule.〔(From Ming to Qing )〕 The Age of Exploration and European colonialism led to an accelerated pace of migration since Early Modern times. In the 16th century, perhaps 240,000 Europeans entered American ports.〔("The Colombian Mosaic in Colonial America" by James Axtell )〕 In the 19th century, over 50 million people left Europe for the Americas.〔David Eltis ''Economic Growth and the Ending of the Transatlantic slave trade''〕 The local populations or tribes, such as the Aboriginal people in Canada, Brazil, Argentina, Australia, Japan〔(Report on a New Policy for the Ainu: A Critique )〕 and the United States, were usually far overwhelmed numerically by the settlers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「History of human migration」の詳細全文を読む スポンサード リンク
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