Archaeological evidence also broadly supports the theory that the people of the Lapita culture are of Austronesian origin. On the Bismarck Archipelago, around 3,500 years ago, the Lapita complex appears suddenly, as a fully-developed archaeological horizon with associated highly developed technological assemblages. No evidence has been found on the archipelago of settlements in earlier developmental stages. This suggests that the Lapita culture was brought in by a migrating population, and did not - as had been proposed in the 1980s and 1990s by scholars like Jim Allen and J. Peter White - evolve locally.