Austronesian expansion and the Wallace Line

With some genetic, linguistic and social science evidence, this guy draws the conclusion that the reason for a lack for original Austronesian Y-monochrome east of the Wallace Line is the result of Austronesian’s matrilineal societies.

I think it is very possible, but if matrilineal societies could be the cause of the men in a society not adventuring into the next island with the women, why didn’t that happen prior to the Wallace Line? Why didn’t the men stay put in Taiwan? or the Philippines, or Malaysia?

I don’t think the mytery of why only the Austronesian language and the X-chromosone crossed the Wallace Line have been solved by this study.

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Thought this was about the British Royal Family again

Wasn’t there a Wallace that caused the then King to abdicate ?

would that be Wallis Simpson?

I think he explains it starting at 12:38. It’s not that the men stayed put, it’s that the matrilineal social structure sucked in Papuan men and their y chromosomes. There’s still questions though–where did the Austronesian men marry, and didn’t they spread their chromosomes? Maybe purely Papuan villages tended to die out over time? Maybe they were more resistant to accepting Austronesian males, and those males only had other Austronesian villages as targets? It is confusing. Maybe the Austronesians totally dominated the existing people in Philippines and Malaysia, or there was less interbreeding for some other reason? Maybe the Papuans were better able to stand up to the onslaught for whatever reason?

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Yes thought Wallace sounds like a guy
Course Wallis looked like a guy

Maybe. I’d imagine the Papuans probably were fairly similar in social structures and technology compared to Negrito populations else where, such as the Philippines or Taiwan. There were probably Austroasiatic speaking communities already living in parts of Malaysia, Thailand and Vietnam when the Austronesians arrived around 4000 years ago? Maybe they played a factor in how Austronesians interacted differently with Papuans?

If Negritos existed in Taiwan, could there have been existing conflict and dispositions against intermixing resulting in a confrontational posture and more of an outright displacement in earlier movements to Philippines and Malaysia?

Could be. I also assume perhaps different communities interacts differently with Negrito communities. Legend has it that Rukai and Paiwan people intermarried Negritos.

In this study, it is said the B4b1 mtDNA haplogroup have been identified across the East Asian mainland, in Japan, and among the Negrito groups of the Philippines. They are thought to have reached these regions prior to the Out of Taiwan (OOT) dispersal 4000 YBP.

So it would seem like at least some people weren’t all that against interbreeding.

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There would still have to be intermixing I would assume. But there might have had more of a disposition to push people out of their way–probably it was pretty crowded in Taiwan :slight_smile: – while later on they were in more of a settling mode. It all happened over a long time.

Sure, and a lot of communities could have come into being well after the earlier migrations.

That got me thinking. When Han immigrants first arrived on the island, Sirayan and other Pingpu aboriginals weren’t adverse to intermarrying either. At the time Aboriginals were still the dominant group, and Sirayans were matrilineal. They married Han immigrants for their skills and knowledge.

I wonder if there is an eventual lost of Pingpu Y-chromosome in Taiwan’s present day Han population, and if so, did that happen in part due to the initial matrilineal selection.