Pre-Columbian era
The earliest known civilization is the Olmec. This civilization established the cultural blueprint by which all succeeding indigenous civilizations would follow in Mexico. Pre-Olmec civilization began with the production of pottery in abundance, around 2300 BCE in the Grijalva River delta. Between 1600 and 1500 BCE, the Olmec civilization had begun, with the consolidation of power at their capital, a site today known as San Lorenzo Tenochtitlán near the coast in southeast Veracruz. The Olmec influence extended across Mexico, into Central America, and along the Gulf of Mexico. They transformed many peoples' thinking toward a new way of government, pyramid-temples, writing, astronomy, art, mathematics, economics, and religion. Their achievements paved the way for the Maya civilization and the civilizations in central Mexico.
Ancient history
The Zapotec emerged around 1500 years BC. They left behind the great city Monte Alban. Their writing system had been thought to have influenced the Olmecs but, with recent evidence, the Olmec may have been the first civilization in the area to develop a true writing system independently. At the present time, there is some debate as to whether or not Olmec symbols, dated to 650 BC, are actually a form of writing preceding the oldest Zapotec writing dated to about 500 BC.