Discuss the importance of River Nile to the civilization of Egypt and Mesopotamia

The river NILE made the land fertile through the regions it passed. As we know, Egypt is mostly desert but regions near NILE are good for growing crops.

Mesopotamia also relied on rivers to provide for fertile land, major transportation routes, drinking water and for agricultural purposes.

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b: the establishment clause  

b: socialism  

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.