What was the primary factor behind the mass movement of peoples from North Africa into the Nile River valley (northeastern Africa) and the Niger River valley (West Africa) around 4,500–3,500 years ago?

Climatic changes / increasing desertification
Exploration
An increase in warfare

Question

﻿What was the primary factor behind the mass movement of peoples from North Africa into the Nile River valley (northeastern Africa) and the Niger River valley (West Africa) around 4,500–3,500 years ago?

Accepted Answer

Climatic changes / increasing desertification

Answer

An increase in warfare

Answer

Exploration

Answer

A Justin Bieber concert in the Nile River valley and a Journey concert in the Niger River valley!

What was the primary factor behind the mass movement of peoples from North Africa into the Nile River valley (northeastern Africa) and the Niger River valley (West Africa) around 4,500–3,500 years ago?

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