What do you feel were some of the great achievements of the meso-american civilizations? how do you think the aztecs and the incas would have continued to develop had the spanish never arrived in the new world?

The Aztec and Mayan civilizations were able to accomplish several feats including the establishment of city-states with great pyramid temples and public plazas with huge stone columns; they also created complex writing and mathematical systems, developed astrological advances, built tools and were able to measure time effectively. They also created many statues, artifacts, ball-playing courts and pottery pieces.

oil! is what i am assuming