I think you might be looking for farming or agriculture.
The rivers allowed irrigation which helped them grow crops. This helped civilizations grow. Other civilizations including Alexander the Great, Romans, and Persians developed better armies to destroy these civilizations.
The earliest civilizations developed in regions where agriculture was practiced. The first civilizations emerged in the fertile crescent region of Mesopotamia with the rise of the Sumerian peoples in the 4th millennium BCE.
Of the coast of Lominos
agriculture
Rise and Fall: Civilizations at War is a real-time strategy game developed by both Stainless Steel Studios and Midway Games; it was released on June 12, 2006.This is an excerpt taken from Wikipedia.
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i have no clue
the slave trade
The Norte Chico and Moche civilizations were both located in present-day Peru and existed during the pre-Columbian era. They both developed sophisticated cultures with complex societies, advanced agricultural practices, and intricate art and monumental architecture. Additionally, both civilizations declined before the rise of the Inca Empire.
agriculture
easy acces for water