We know this thanks to archaeologists who excavated many places and discovered that many early civilizations gathered around large rivers where they could develop agriculture. This was seen in places such as Mesopotamia, India, China, Egypt, etc.
The correct answer is The U.S. currency has a predictable value.
Explanation: The reason why the United States has a fiduciary monetary system is because they has a predictable value in the future.
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Confucianism is an ethic of moral uprightness, social order, and filial responsibility. Daoism was a philosophy of universal harmony that urged its practitioners not to get too involved in worldly affairs. Legalism is a theory of autocratic, centralized rule and harsh penalties.
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This should be what your looking for