07/16/2014 11:19 am ET Updated Jul 16, 2014

An Interactive Guide To The Sunni-Shiite Divide

KARIM SAHIB via Getty Images

An ancient religious divide is helping fuel a resurgence of conflicts in the Middle East and Muslim countries. Struggles between Sunni and Shia forces have fed a Syrian civil war that threatens to transform the map of the Middle East, spurred violence that is fracturing Iraq, and widened fissures in a number of tense Gulf countries. Growing sectarian clashes have also sparked a revival of transnational jihadi networks that poses a threat beyond the region.

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