In the eras before European influences, the Americas were populated by diverse groups of indigenous cultures including in Mesoamerica (the Olmec, the Toltec, the Teotihuacano, the Zapotec, the Mixtec, the Aztec, and the Maya) and the Andes (Inca, Moche, Chibcha, Ca–aris). This period before the arrival of Europeans is called the Precolumbian Era. The oldest known culture in the…