The End of the Olmecs Civilization The Olmec civilization lasted for about 1100 years. No one is certain the end of the Olmecs civilization. Many of the intellectual achievements of the Olmecs, such as a writing system and a calendar, were eventually adapted and improved upon by these other cultures. Around 400 BC, the great … Continue reading The End of the Olmecs Civilization | Why did the ancient Olmec civilization disappear?