What was the impact of Islam on the empire of Ghana?

The Islamic religion had a great effect on West African societies. In the first place, it challenged traditional African religion, weakening the basis on which some of the Sudanese states such as Kanem and ancient Ghana rested, contributing to their downfall.

Explanation:

Islam was spread throughout the region by Muslim merchants as they came into contact with local traders and the elite of urban areas. ... Indeed, in the Ghana Empire, there is no evidence that kings themselves converted to Islam.

to regulate production on things such as fuel and production

the roman army grew in size and became dominant in the mediterranean region.