The rise of civilization was supported by the local ecology of well-watered soil, and by the network of transportation that was provided by the Coatzacoalcos River basin. This, in turn, triggered the rise of an elite class. The elite class generated the demand for the production of sophisticated luxury artifacts that define Olmec culture. They shared the language, the way the city-states were governed by the noble, used the same method of counting, admired the same gods and told the related myths, Same laws, and same style of clothes.