The crop from which chocolate, the favoured drink of the nobility of many Mesoamerican cultures, is produced. Because its production is limited by the environmental setting in which it will flourish (that is, tropical lowlands), cacao attained considerable importance as a luxury item in the economies of the Maya, Teotihuacan and Aztec. Depictions on Izapan sculpture show that it was first used in the Pre-Classic period. The Codex Mendoza indicates that by Aztec times it had become a medium of exchange and that tribute was commonly paid in this commodity.
The Macmillan dictionary of archaeology, Ruth D. Whitehouse, 1983Copied