Archaic islanders outlast the newcomers and shape what follows

For centuries after pottery making farmers reached Puerto Rico, the people already living there carried on. Archaeology finds them keeping their own food supply and their own way of making tools while the newcomers, whom archaeologists call Saladoid, settled the same island. The two populations shared the ground for a very long time. What happened next shows in the stone. Close study of flaked and ground tools finds the Archaic Age industry and the later Ostiones industry closely related, which means the working knowledge of the first inhabitants passed into the societies that came after them. Archaeologists call this transculturation, and the plain version of it is that descendants of the first islanders helped build the Ceramic Age. The Caribbean past is usually told as a series of arrivals, each one erasing the last. The evidence from Puerto Rico describes something slower. Two peoples lived alongside each other for generations until the distinction stopped being useful, and the older population left its mark on everything that followed.

By around the third century CE the Malagasy speaking community on the East African coast had lived among Bantu speaking neighbours long enough to have married into them. Some of them then sailed south, crossed the Mozambique Channel, and settled Madagascar. What they carried was a working farm system assembled out of two hemispheres: African livestock and African grain beside rice, bananas and chickens from Island South Asia, together with the practices that belonged to each. Madagascar has been that combination ever since. Its people speak an Austronesian language whose nearest relatives are in Borneo. They raise cattle bred in Africa and poultry domesticated in Southeast Asia. They grow African sorghum in the same country as Asian rice. Their ancestry is Bantu and Austronesian together. The island is the clearest surviving record of how far the ancient Indian Ocean trade reached and what it did on arrival, which was to move people, crops, animals and languages until two ends of the world were permanently joined in one place.

Around the middle of the fifth century CE, people speaking Arawakan languages arrived on Aruba, Curacao and Bonaire, the islands lying off the coast of Venezuela, and brought pottery making with them. Their arrival marks the start of the Ceramic age on those islands. Somebody was already there. The earlier inhabitants belonged to the Archaic age, made a simpler set of tools, and are physically distinguishable in the skeletal record by the shape of the skull. They were displaced. Rouse records the sequence in the flat language of archaeology, and the flatness is worth noticing, because the displacement of one population by another is a thing that happens to people. These three islands sit where the South American mainland meets the Caribbean, which makes them a gauge for movements that later reached the whole chain of the Antilles. What happened here in the fifth century had happened elsewhere before and would happen again, long before any European ship arrived to start the count.

At the Canas site in Puerto Rico the Saladoid and Ostiones layers sit one above the other with a clean line between them, and the early conclusion drawn from that line was that two separate cultures had occupied the site in turn. The difficulty with that reading is that nobody could find anywhere for the second culture to have come from. No source region, no migration route. So the material was examined again, and the current view is that Ostionoid pottery grew out of the Saladoid tradition in the islands themselves, with recent argument pointing to the eastern Dominican Republic and the exchanges taking place there. Other evidence supports continuity. Stone toolmaking runs straight through the transition with no equivalent break. What changed was the pottery, and pottery is the loudest thing in an excavation. The change marks the beginning of a period in which the Greater Antilles broke into regions, each developing a look of its own.