Peopling of Southeast Asia

Southeast Asia was first reached by anatomically modern humans before 60,000 years ago, possibly before 70,000 years ago.[1] The oldest anatomically modern human fossil from Southeast Asia was found in Callao Cave, near Peñablanca, Cagayan, dated to 67,000 years old in 2010.[2] Anatomically modern humans are suggested to have reached Southeast Asia in the course of the Southern Dispersal migration before the formation of a separate East Asian clade, at around 40,000 years ago.[3]

See Archaic humans in Southeast Asia for the earlier presence of archaic humans.

In Asia, the most recent late archaic human fossils were found in China (125-100 ka), the Philippines (58-24 ka), Malaysia (c. 40 ka), and Sri Lanka (c.36 ka).[4] The artifacts from these sites include partial skeleton, crania, deep skull, and other related skeletons indicate that modern human migrated to Asia earlier than the western theory might have discussed.[5]

In 2007, an analysis of cut marks on two bovid bones found in Sangiran, showed them to have been made 1.5 to 1.6 million years ago by clamshell tools. This may be the oldest evidence for the presence of early humans in today Indonesia and are to date the oldest evidence of shell tool use in the world.[6]

In 2009, archaeologists discovered the partial cranium and some teeth of a modern human at Tam Pa Ling in mainland Laos, which shed light on the understanding of anatomically modern human migration and evolution in the region during the Late Pleistocene Period.[5] The site is located in Houaphanh Province, around 170 miles north of Vientiane, the capital city of modern Laos. Within this site, only human remains were found, and there is no evidence of human occupation or other artifacts. The radiocarbon dating of the charcoal and the sediment dating analyses identify the remains to date at least c. 56.5 ka, while the dental artifacts from the remains that analyzed by the isotope-ratio measurement indicate c. 63.6 ka.[5] The analysis of the cranium and dentition of the remains suggest that these are the remains of early modern human populations in Southeast Asia. This date is older than the fossils that were found in Niah cave in Malaysia, which offers another explanation for human evolution in Southeast Asia.

In addition to the discovery in Laos, there are also a number of human remains and related artifacts found across mainland Southeast Asia in which it suggests the new ideas of the regional Late Pleistocene development as well. More teeth and molars that were found in Thailand and Vietnam sites (Tham Wihan Naki, Thailand; Tham Kuyean, Vietnam, etc.) indicate transitions between H. erectus and H. sapiens.[7] In fact, these remains might indicate the possible interbreeding between H. erectus and H. sapiens, such as the tooth at Wihan Nakin at Chaiyaphum province in Thailand.[7]

The Neolithic was characterized by several migrations into Mainland and Island Southeast Asia from southern China by Austronesian, Austroasiatic, Kra-Dai and Hmong-Mien-speakers.[8][9] During the Neolithic, Austroasiatic peoples populated Indochina via land routes and sea-borne Austronesian immigrants preferably settled in Maritime Southeast Asia. The earliest agricultural societies that cultivated millet and wet-rice emerged around 1700 BCE in the lowlands and river floodplains of Indochina.[10]

The Austronesian Expansion(3500 BC to AD 1200)

The most widespread migration event, was the Austronesian expansion, which began at around 5,500 BP (3500 BC) from Taiwan and coastal southern China. Due to their early invention of ocean-going outrigger boats and voyaging catamarans, Austronesians rapidly colonized Island Southeast Asia, before spreading further into Micronesia, Melanesia, Polynesia, Madagascar and the Comoros. They dominated the lowlands and coasts of Island Southeast Asia, giving rise to modern Islander Southeast Asians, Micronesians, Polynesians, and Malagasy.[11][12][13][14] The first Austronesians reached the Philippines at around 2200 BC, settling the Batanes Islands and northern Luzon from Taiwan. From there, they rapidly spread downwards to the rest of the islands of the Philippines and Southeast Asia.[15][16]

The Austroasiatic migration wave centred around the Mon and the Khmer, who originate in North-Eastern India arrive around 5000 BP and are identified with the settlement on the broad riverine floodplains of Burma, Indochina and Malaysia.[17]

Territorial principalities in both Insular and Mainland Southeast Asia, characterised as Agrarian kingdoms[18] had by around 500 BCE developed an economy based on surplus crop cultivation and moderate coastal trade of domestic natural products. Several states of the Malayan-Indonesian "thalassian" zone[19] shared these characteristics with Indochinese polities like the Pyu city-states in the Irrawaddy river valley, Van Lang in the Red River delta and Funan around the lower Mekong.[20] Văn Lang, founded in the 7th century BCE endured until 258 BCE under the rule of the Hồng Bàng dynasty, as part of the Đông Sơn culture eventually sustained a dense and organised population, that produced an elaborate Bronze Age industry.[21][22]

Intensive wet-rice cultivation in an ideal climate enabled the farming communities to produce a regular crop surplus, that was used by the ruling elite to raise, command and pay work forces for public construction and maintenance projects such as canals and fortifications.[21][19] Though millet and rice cultivation was introduced around 2000 BCE, hunting and gathering remained an important aspect of food provision, in particular in forested and mountainous inland areas.[23]

Historians have emphasized the maritime connectivity of the Southeast Asian region whereby it can be analyzed as a single cultural and economic unit, as has been done with the Mediterranean basin.[24] This region stretches from the Yangtze delta in China down to the Malay Peninsula, including the South China Sea, Gulf of Thailand and Java Sea. The region was dominated by the thalassocratic cultures of the Austronesian peoples.[25][26][27]

The proposed route of Austroasiatic and Austronesian migration into Insular Southeast Asia during the Neolithic period.

One study (Chaubey 2015) found evidence for ancient gene flow from East Asian-related groups into the Andamanese people, suggesting that Andamanese (Onge) had about 30% East Asian-related ancestry next to their original Negrito ancestry, though the authors also suggest that this latter finding may in fact reflect the genetic affinity of the Andamanese to Melanesian, Southeast Asian, and Asian Negrito populations rather than true East Asian admixture (stating that "The Han ancestry measured in Andaman Negrito is probably partially capturing both Melanesian and Malaysian Negrito ancestry"),[28] as a previous study by the authors (Chaubey et al.) indicated "a deep common ancestry" between Andamanese, Melanesians and other Negrito groups (as well as South Asians), and an affinity between Southeast Asian Negritos and Melanesians with East Asians.[29]

A 2020 genetic study on Southeast Asian populations by Liu et al. 2020, found that most Southeast Asians are closely related to East Asians and carry mostly "East Asian-related" ancestry. Austronesian and Austroasiatic speaking populations of Southeast Asia were found to have mostly East Asian-related ancestry (89% to 96%, 94% on average) and minor Onge-related ancestry (1% to 11%). Taiwanese indigenous peoples had on average 99% East Asian-related ancestry. Kra-Dai speaking populations had, similar to the Taiwanese indigenous peoples, nearly exclusively East Asian-related ancestry. In one proposed scenario (Fig.8.C), The Andamanese (Onge) clade used by Liu et al. 2020 is modeled by the authors from two distinct components, one indigenous component at 55% and one East Asian component at 45%, while in the other modelled scenarios (Fig.8.A and Fig.8.B, as well as D, E, and F), the East Asian component is not modelled for the Onge.[30][31]

See also

References
  1. Rasmussen, M; Guo, X; Wang, Y (2011). "An Aboriginal Australian genome reveals separate human dispersals into Asia". Science. 334 (6052): 94–8. Bibcode:2011Sci...334...94R. doi:10.1126/science.1211177. PMC 3991479. PMID 21940856. We show that Aboriginal Australians are descendants of an early human dispersal into eastern Asia, possibly 62,000 to 75,000 years ago. This dispersal is separate from the one that gave rise to modern Asians 25,000 to 38,000 years ago.
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  31. "Fig.8. Admixture graph C".
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