The main cause was the Stock Market Crash of 1929.
A war of attrition.
World War 1 is an example of this.
They were hard to get to from city centers.
They had bad odors.
They were cramped and dangerous to live in.
<span>Religion, cities, government, jobs, social classes and writing
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All of these civilization that developed in the Mesoamerica. They were heavily organized into complex societies, with social classes and religion playing a vital role.They also had varying forms of developed governments.
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