The Mayan civilization was advanced for its time as were the Aztecs. Both were brutal as were their conquerors. The Mayan civilization collapsed due to climate change. It collapsed before one damn barrel of oil was produced from the ground by man. The Aztecs collapsed by the sword and musket of Spanish Conquistadors. Both of their blood lines still exist but not as a civilization nor tribe. They mixed with the Spanish Conquistadors. Today they are called Mexicans. I am quite familiar with them, I grew up on the border and married one, now 30 years plus. A lot of us white boys in Texas did. I guess I am a Texican.
I forgot to add my governor of Texas also married a Mexican lady of class and beauty. He chose wisely. He joined the band of Texicans. He has been an outstanding conservative governor.
You should visit the Maya Mountain area of Belize. The Maya there survive as a mostly distinct culture. They still practice forms of ancient Mayan rituals. They are not Hispanic in any sense. The location is quite close to the ancient Mayan city-states of Caracol, Naranja and Tikal.