I am a pretty big fan of chocolate; but I don't think I'm alone.  Cacao is be cultivated and used for nearly 3000 years!
where does it come from? 
It comes from the "Theobroma cacao" seeds.  It seems to come from the Mesoamerican cultures.  The Mayans and the Aztecs used it in beverages known as "xocolatl"
does it provide any health benefits ?
History of chocolate
The "history of chocolate" began in Mesoamerica. Fermented beverages made from chocolate date back to 450 BC. The Aztecs believed that cacao seeds were the gift of Quetzalcoatl, the god of wisdom, and the seeds once had so much value that they were used as a form of currency. Originally prepared only as a drink, chocolate was served as a bitter liquid, mixed with spices or corn puree. It was believed to be an aphrodisiac and to give the drinker strength. Today, such drinks
alcoholic Chocolate.
 – chocolate is a processed, typically sweetened food produced from the seed of the tropical "Theobroma cacao" tree. Its earliest documented use is by the Olmecs of south central Mexico around 1100 BC. The majority of Mesoamerican people made chocolate drinks, including the Mayans and Aztecs, who made it into a drink known as "xocolātl" , a Nahuatl word meaning "bitter water".
- List of chocolate drinks
Non-alcoholic Plant-based.
Non-alcoholic Plant-based Barley.
-