Original: Cultures that may be considered advanced or civilized include : Cahokia , Zapotec , Toltecs , Olmec , Maya , Aztecs , Purepecha , Chimor , and the Inca .
Simplified: Cultures that may be considered advanced or civilized include : Cahokia , Zapotec , Toltecs , Olmec , Aztecs , Chimor , and the Inca .