What was the aztecs and incas ways of living in?

The Maya, Inca, and Aztecs built great civilizations in Mexico and in Central and South America between 1,800 and 500 years ago. The first of these was the Maya civilization.About 2,800 years ago, people known as the Maya lived in farming villages on the Yucatan Peninsula and the highlands to the south. From about A.D. 250 to A.D. 900, they built city-states in Central America that included great pyramid temples and public plazas featuring huge stone columns that recounted their history. Excavations at Tikal, Guatemala, one of the greatest and oldest Maya centers, have revealed thousands of structures and artifacts. The findings include temples, pyramids, ball-playing courts, stone monuments, tools, ceremonial objects, and a great many pottery fragments. 

The limestone of the Yucatan Peninsula was easily quarried and used for building and tool making. In the south, volcanoes stretched over the highlands and yielded valuable resources. The fertile volcanic soil allowed the people to grow crops. 

  the domino theory states that  if one country in a region came under the influence of communism, then the surrounding countries would follow in a  domino  effect.