The Olmecs: First civilization of the Western Hemisphere

The Olmecs are believed to be the first civilization of the Western Hemisphere, and are credited with the invention of chocolate and rubber. They are the parent civilization for later Mesoamerican civilizations (such as Aztecs and Mayas). In a way, they can be thought of as the Sumerians of the Americas, as they are to subsequent Mesoamerican cultures what the Sumerians were to subsequent Middle Eastern cultures. However, a good deal more is known about the Sumerians than the Olmecs, because the Olmec text has yet to be deciphered. Most of what is known about them either comes from others, or is inferred via study of their artifacts.

Sources:
https://historyplex.com/olmecs-history
https://whatmaster.com/what-was-the-olmec-culture/
https://www.khanacademy.org/humanities/world-history/world-history-beginnings/ancient-americas/a/the-olmec-article

https://www.bibhudevmisra.com/2016/08/olmec-yogis-with-hindu-beliefs-did-they.html