Our understanding of the recent expansion of the Austronesian-speaking language groups out of Taiwan and into Southeast Asia and Polynesia is enhanced by a new paper out in Science, which argues through the analysis of 400 Austronesian languages that the Austronesian expansion occurred in pulses, which were correlated to the development of new technologies and social innovations.
Language Phylogenies Reveal Expansion Pulses and Pauses in Pacific Settlement
Science, 23 January 2009
Pacific people spread from Taiwan
Science Daily, 22 Jan 2009
Debates about human prehistory often center on the role that population expansions play in shaping biological and cultural diversity. Hypotheses on the origin of the Austronesian settlers of the Pacific are divided between a recent “pulse-pause” expansion from Taiwan and an older “slow-boat” diffusion from Wallacea. We used lexical data and Bayesian phylogenetic methods to construct a phylogeny of 400 languages. In agreement with the pulse-pause scenario, the language trees place the Austronesian origin in Taiwan approximately 5230 years ago and reveal a series of settlement pauses and expansion pulses linked to technological and social innovations. These results are robust to assumptions about the rooting and calibration of the trees and demonstrate the combined power of linguistic scholarship, database technologies, and computational phylogenetic methods for resolving questions about human prehistory.
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