In the Formative Period 4,000 years before the Incas and the arrival of the Conquistadors, Peru’s earliest civilizations - the Chavín, Caral, Ventarrón, Sechin, Cupisnique, and Cajamarca cultures - built centers of learning and technological achievements, including the largest work of hydrological engineering in the ancient Americas: the Cumbemayo canals.

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Stephen Hughes