Vast Empires
Obviously not or we would not be referring to them as "early" civilisations.
Job Specialization
Early Egypt and Mesopotamia.
the establishment and rapid growth of permanent settlements
Because of its geography
North America and Europe
Cahokian.
Anasazi
Anasazi
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Mayan and Aztec civilizations of Central and South America
The Native American civilizations such as the Mayan & Aztec are known for their very accurate calendars.
Aztec and Mayan civilizations did
Many of the most successful great early American civilizations built large cities along water. Typically these cities were built along the Atlantic Ocean.
To honor their rulers and please their gods
The Incas had the largest empire in early American civilizations.