How did the introduction of Islam affect the development of African civilizations?

Islam in Africa has linked together diverse peoples through better cultural understanding and a spirit of cooperation and common weal. ... The historial impact of Islam upon trade, particularly in West Africa, greatly increased the wealth of African people and helped form many great African empires.

It's either

Islam in Africa has linked together diverse peoples through better cultural understanding and a spirit of cooperation and common weal. ... The historial impact of Islam upon trade, particularly in West Africa, greatly increased the wealth of African people and helped form many great African empires.

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ECONOMIC EFFECTS

Islam promoted trade between West Africa and the Mediterranean. The religion developed and widened the trans-Saharan Caravan trade. The trade enriched the West African and the Muslim traders. Muslims from North Africa came in their numbers and settled in the commercial centres.

the government closely monitored its finances to avoid another financial collapse.

monopolies  came to the united states with the colonial administration. the large-scale public works needed to make the new world hospitable to old world immigrants required large companies to carry them out. these companies were granted exclusive contracts for these works by the colonial administrators. even after the american revolution, many of these colonial holdovers still functioned due to the contracts and land

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