Which social structure did the Aztecs and the Incas have in common? a collection of city-states that fought for dominance
a coalition of city-states that developed trade alliances
a group of tribes that were unified under one religion
a system of classes that were organized like a pyramid

a system of classes that were organized like a pyramid

Explanation:

In Addition to the Inca social system, the Aztecs had landless serfs and slaves. Therefore, the Pyramid like structure that existed in the society was the common feature of both the Empires.

the process is called revolution because it was a process of great economic-social transformations that began in england in the xviii century.

the industrial mode of production spread throughout much of the northern hemisphere throughout the xix and early xx centuries.

the effect of this revolution was the distance between the countries, with respect to economic and political power.   after all, not all industrialized at the same time, remaining in the condition of suppliers of raw materials and agricultural products to the industrialized countries.

these differences mark to this day the nations of the world that are divided between developed and developing countries. one way to measure whether a country is advanced is to assess how industrialized it is.