Akar Nusa
Picture a map of the whole region, not with borders but with arrows. Some arrows are very old and come from the south. Some come from the north, down rivers and coasts. They all cross at one place: the lands we now call Malaysia.
The story
Southeast Asia's story is told in layers.
Layer one: the first people. Modern humans reached this region at least 40,000 years ago, and perhaps much earlier. Their living descendants are usually said to include the Semang of Malaysia and the Aeta of the Philippines.
Layer two: farmers from the north. Ancient DNA from Vietnam, studied by Lipson and colleagues, shows that early farmers there mixed southern Chinese farmer ancestry with the old hunter-gatherer ancestry of the region. This matches the pattern of Austroasiatic speakers, and similar ancestry reached as far as Indonesia. Further waves followed by the Bronze Age.
Layer three: sea people. The Austronesian peoples spread out from about 5,500 years ago, reaching the Philippines about 2200 BCE and onward to the rest of the islands. But the exact story is argued. A 2016 study found that the people of Taiwan and island Southeast Asia share mostly older common ancestry from before farming, plus two small later migrations. It suggested that Austronesian languages spread by small-scale movement and language shift, rather than a huge migration.
Layer four: Kra-Dai speakers. About 4,000 years ago, Kra-Dai speakers moved south from southern China into mainland Southeast Asia.
A study of Malaysians from indigenous groups (Bidayuh, Selatar and Temuan) found mother lines from the Asian mainland dating from about 30,000 to 10,000 years ago, and few markers of a late Taiwan arrival. The authors proposed an earlier "early train" migration. A wider study of Asia found that half of East Asian gene variants appear only in Southeast Asia, so the region was a main source of East Asian peoples, not only a place people passed through.
Later, traders and settlers from India, China, Arabia and Europe added more threads. They are told in other stories on this site.
The big lesson is that the old picture of one simple wave of settlers is too simple. Different scientists use different methods and reach different mixes. All of them agree that Southeast Asia was settled early, many times, by many groups, and that its peoples are closely related. That fits the idea of one shared Malaysian family: its members are cousins at many distances.
Where you can still see it today
- The Semang community of Peninsular Malaysia, among the oldest peoples in the region.
- Austronesian languages across Malaysia, Indonesia and the Philippines.
- Every Malaysian family tree, which crosses several of these layers.
What DNA can tell, and what it cannot
This is where DNA is strongest. A mother line and a father line can reach back thousands of years. Common old lines in western island Southeast Asia include the father line O-M119. But scientists still argue about which layer brought which line, so we do not claim a line "belongs" to one people.
A region estimate can show a Southeast Asian base with other threads. It cannot place you in a single wave. DNA does not decide race, religion or bumiputera status.
