Explanation:
Mali prospered from taxes collected from its citizens, and all goods brought in and out of the Empire were heavily taxed while all gold nuggets belonged to the King. ... The Empire of Mali was also a multi-ethnic and multi-linguistic empire, and Islam was the dominant religion [xviii]. The wealth of ancient Mali was based on trade, particularly the trans-Sahara trade. Control and taxation of trade pumped wealth into the imperial treasury and sustained the Mali Empire's existence. The most profitable commodities traded were gold and salt.
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