Alot of people called them that so they stuck to it.
the olmecs
Because they were pretty much the first culture to begin with.
The Zapotec
They are called mother civilization because the invented writing.
There was a civilization named after a group of people called the Olmecs in what is now southern Mexico but the civilization died out around 400BC.
It appears that because many groups of Native peoples learned from the Olmec civilization and they ways of life, building, education and establishment of a "civilization , they were called the "mother civilization" of the Americas.
The Olmecs.
from about 1200 until about 100 B.C
Dia de los Muertos is an Olmecs holiday in Mexico that is also celebrated in many parts of America. It honors the Olmecs as the most advanced historic civilization in the country.
The Olmecs were the first and invented and made corn
mesosmerica is where it was located......:)
The Olmecs