Andean Civilizations in Order, From Caral to the Inca

The Inca empire held its full extent for less than a hundred years. Everything people associate with "ancient Peru" — monumental platforms, irrigation, textiles, metalwork, road systems, knotted-cord record keeping — was already old when the Inca began expanding, in some cases by four thousand years. Putting the sequence in order is the single most useful thing you can do with Andean history, because it turns the Inca from the subject into the last chapter.

Here is that sequence, with the evidence each stage rests on.

Caral and the Late Archaic coast

UNESCO describes the Sacred City of Caral-Supe as a 5,000-year-old, 626-hectare archaeological site on a dry desert terrace overlooking the Supe valley, dating to the Late Archaic Period of the Central Andes, and calls it the oldest centre of civilization in the Americas. It records six large pyramidal structures, sunken circular courts, and complex monumental architecture — and, significantly, a quipu, the knotted-cord system used in Andean societies to record information.

Two details are easy to miss and worth pausing on. Caral was one of eighteen urban settlements in the same area, so this is a regional phenomenon rather than a single precocious site. And the monumental construction is roughly contemporary with the Egyptian pyramid age, on a coast with no ceramics and no writing in the Old World sense.

Chavin: the first wide horizon

UNESCO records that the site of Chavin gave its name to a culture that developed between 1500 and 300 BCE in a high Peruvian valley, describing terraces and squares surrounded by dressed stone structures with largely zoomorphic ornamentation, and calling it one of the earliest and best known pre-Columbian sites.

Chavin matters because its artistic vocabulary spread widely without any evidence of conquest — a religious and stylistic horizon rather than an empire. That distinction, between cultural reach and political control, recurs throughout Andean prehistory and is worth carrying forward.

Regional states: Moche, Nasca and their neighbours

The centuries either side of the start of the Common Era produced sharply distinct regional societies. UNESCO dates the Nasca and Palpa geoglyphs — scratched into the surface of the arid coastal plain over an area of about 450 square kilometres — to between 500 BCE and 500 CE, describing depictions of living creatures, stylised plants, imaginary beings and geometric figures several kilometres long, and noting they are believed to have had ritual astronomical functions.

"Believed to have had" is the appropriate register. Function is inferred here, not documented, and any confident single explanation of the Nasca lines should be treated as a hypothesis wearing a suit.

Tiwanaku and Wari, at the same time

The next stage is the one most often garbled into a succession. UNESCO dates the city of Tiwanaku, capital of a pre-Hispanic empire that dominated a large area of the southern Andes and beyond, as reaching its apogee between 500 and 900 CE, and describes it as distinct from any other pre-Hispanic empire of the Americas.

Wari was its contemporary, not its successor. Excavation at Cerro Baul, a Wari centre established as an enclave in a valley that Tiwanaku had colonised, found it to be a major political and religious centre rather than a fortress, and on the basis of twelve radiocarbon dates concluded that the interaction between the two states lasted roughly two hundred years, with moments of tension and moments of cooperation.

Two expanding highland powers sharing a valley for two centuries without either destroying the other is a more interesting political situation than a simple conquest narrative, and it is exactly the kind of finding that only radiocarbon and stratigraphy can produce.