The Olmecs (/ˈɒlmɛks, ˈoʊl-/) or Olmec were an early known major Mesoamerican civilization, flourishing in the modern-day Mexican states of Veracruz and Tabasco from roughly 1200 to 400 BCE during Mesoamerica's formative period. They were initially centered at the site of their development in San Lorenzo Tenochtitlán, but moved to La Venta in the 10th century BCE following the decline of San Lorenzo. The Olmecs disappeared mysteriously in the 4th century BCE, leaving the region sparsely populated until the 19th century.
Among other "firsts", the Olmec appeared to practice ritual bloodletting and played the Mesoamerican ballgame, hallmarks of nearly all subsequent Mesoamerican societies. The aspect of the Olmecs most familiar now is their artwork, particularly the colossal heads. The Olmec civilization was first defined through artifacts which collectors purchased on the pre-Columbian art market in the late 19th and early 20th centuries. Olmec artworks are considered among ancient America's most striking.
Origins:
Pre-Olmec cultures had flourished since about 2500 BCE, and it has been speculated that the Olmecs derived in part from the neighboring Mokaya or Mixe–Zoque cultures which developed during this time. The beginnings of Olmec civilization have traditionally been placed between 1400 BCE and 1200 BCE. Past finds of Olmec remains ritually deposited at the shrine El Manatí near the triple archaeological sites known collectively as San Lorenzo Tenochtitlán moved this back to at least 1600–1500 BCE. It seems that the Olmec had their roots in early farming cultures of Tabasco, which began between 5100 BCE and 4600 BCE. These shared the same basic food crops and technologies of the later Olmec civilization.
What is today called Olmec first appeared fully within San Lorenzo Tenochtitlán, where distinctive Olmec features occurred around 1400 BCE. The rise of civilization was assisted by the local ecology of well-watered alluvial soil, as well as by the transportation network provided by the Coatzacoalcos river basin. This environment may be compared to that of other ancient centers of civilization such as the Nile, Indus, Yellow River and Mesopotamia. This highly productive environment encouraged a densely concentrated population, which in turn triggered the rise of an elite class.
The elite class created the demand for the production of the symbolic and sophisticated luxury artifacts that define Olmec culture. Many of these luxury artifacts were made from materials such as jade, obsidian, and magnetite, which came from distant locations and suggest that early Olmec elites had access to an extensive trading network in Mesoamerica. The source of the most valued jade was the Motagua River valley in eastern Guatemala, and Olmec obsidian has been traced to sources in the Guatemala highlands, such as El Chayal and San Martín Jilotepeque, or in Puebla, distances ranging from 200 to 400 km (120–250 miles) away, respectively.
1530 BCE.