Aztec Empire to retain and freely continue their own religious traditions, so long as they added the imperial god to their local pantheons. The word "Aztec" in modern usage would not have been used by the people themselves. It has variously been used to refer to the Triple Alliance empire, the Nahuatl-speaking people of central Mexico prior to the Spanish conquest, or specifically the Mexica ethnicity of the Nahuatl-speaking peoples. The name comes from a Nahuatl word meaning "people from Aztlan," reflecting the mythical place of origin for Nahua peoples. For the purpose of this article, "Aztec" refers only to those cities
Olmecs Olmec chronology came to a head at a 1942 Tuxtla Gutierrez conference, where Alfonso Caso declared that the Olmecs were the "mother culture" (""cultura madre"") of Mesoamerica. Shortly after the conference, radiocarbon dating proved the antiquity of the Olmec civilization, although the "mother culture" question generated considerable debate even 60 years later. The name "Olmec" means "rubber people" in Nahuatl, the language of the Aztec, and was the Aztec name for the people who lived in the Gulf Lowlands in the 15th and 16th centuries, some 2000 years after the Olmec culture died out. The term "rubber people" refers to