• The transition from nomadic to urban life
• The ancient civilizations of the Americas
• Early civilization in the Andes mountain region
• The early civilizations of Mesoamerica
• Reading about prehistory
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In world history, modern human beings (those human ancestors who fall under the category homo sapiens and are most like human beings today) go back about 150,000 years. For at least 142,000 of those years, Earth's people were nomadic (roaming from place to place without a fixed home); they traveled in small family groups or lived in tiny, temporary villages without government (a political organization,...