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Around 600 A.D. -
	Arab conquest of North Africa 

Gold salt trade 
	(berbers traded) 

West Africa

Ghana began around 500 A.D. (centralization) - 1200 A.D. 
Around Senegal river

Fertile savanna, agriculture - yams, wheat & grains 
			Later - with arab influence - rice 

Politically. Small farming villages. 
		Village council to take care of affairs within the village. 
Representatives from villages report to the King.