According to archaeologist in order to be defined as a civilization certain criteria must be met. Early archaeologists believed in order to be considered a civilization a society must have cultural superiority, which meant they must have the ability to read and write. If this was the sole criteria used to judge if a society was labeled a civilization, then you could say the Inca of South America, who constructed cities on top of mountains and had a complex system of irrigation canals, were not one because they did not have a system for reading or writing. Modern archaeologists now think of civilization as not better but different. The modern definition of civilization consists of