Explanation:
1 The greatest Saharan empire cities were Timbuktu and Djenné, both of which lie on the Niger. While these empires were the most prominent Islamic states in Sub-Saharan Africa, smaller Islamic kingdoms formed to the east, such that nearly the entire northern half of the continent fell under Islamic rule.
Every interpretation possible. But see there’s no source attached
It kept the church from gaining to much power and the govt from gaining too much power it went both ways to cause neutral power between the two.