Mexico: a cultural capsule
Background:
At the time of the conquest by Spain, the two most well-known groups of  Native Americans in Mexico were the Aztecs, also referred to as the Mexicas, and the Mayans.   Both groups of Native Americans had very well developed civilizations. 
The largest group of immigrants to Mexico were the Spaniards, led by the conquistador Hernan Cortes. As a result of the conquest, roughly six and half million indigenous people died of various diseases and exploitation by the conquistadors.  There were also immigrants from other countries, including Spanish-speaking Africans and people from the Philippines. 
OLMEC head, Mexico City
The Mayans lived and still live in the south central and southeastern parts of Mexico.  The Aztecs or Mexica, who are the ancestors of the Nauhuatl, lived and still live in the Central parts of Mexico.