A continent that was more known for tribal shamans than for steeples and minarets has, in just 110 years, become one of the world's most religiously devout regions, according to the Pew Forum.

A new massive survey, "Tolerance and Tension: Islam and Christianity in Sub-Saharan Africa," released Thursday, charts how a region that gave birth to the term "global South" is now in the driver's seat in terms of world religious practice.

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