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The Caral-Supe / Norte Chico Civilization. The Caral-Supe civilization was the oldest known complex society in the Americas, flourishing along the arid north-central coast of Peru from roughly 3000 BCE to 1800 BCE. Centered around major urban complexes like Caral in the Supe Valley, this culture predated the Egyptian pyramids by centuries. This civilization matters because it proved that monumental urban architecture and complex social organization could emerge in the Americas without the reliance on ceramics or staple grain agriculture, relying instead on cotton and marine resources.
Caral featured massive platform mounds, sunken circular plazas, and complex irrigation canals that channeled river waters across coastal valleys. They traded cotton nets with coastal fishermen in exchange for seafood, generating a peaceful, highly cooperative economic network devoid of major defensive fortifications or weapons. The civilization also produced quipus—knotted string devices used for record-keeping. Environmental shifts, prolonged droughts, and coastal erosion eventually forced the abandonment of Caral-Supe around 1800 BCE.