Why did West African trading empires and fall?

Prior to the rise of European dominance and the resultant slave trade, the large empires of the middle ages usually collapsed due to outside incursions or trade bans from North African kingdoms, notably the Moroccan and Egypt kingdoms. Such invasions caused the collapse of empires such as Ghana, Mali and Songhali.

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the answer is: the sesquicentennial of the american civil war is an occasion to consider the legacy of that great conflict. this legacy is our inheritance, and despite many indelible features, we continue to negotiate the resolution of that conflict. the civil war was fought over slavery, but not always on behalf of slaves

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