The Olmec is influences continued to appear in many later Mesoamerican civilizations. Cities of the Aztecs, Mayas, and Incas were as large and organized as the largest in the Old World, with an estimated population of 200,000 to 350,000 in Tenochtitlan, the capital of the Aztec empire.
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1. Nomads migrate according to climate conditions so they can feed their flock
2. Nomads don’t produce manufactured goods so they need to trade so they don’t live near settled people
3. Because they live close to nature and harsh conditions pastoralists is tougher than diamond plated differential calculus
4. Pastoral people tend to be more egalitarian