QUICK FACTS:
People groups: 91
Population: 131,327,100
Unreached people groups: 86
UPG population: 131,139,700
Unengaged UPGs: 37
UUPG population: 22,419,800
Number of countries: 37
Base Religion: Islam
Description: Shia and Sunni Muslims share many fundamental Islamic beliefs but differ over the question of leadership. Shia Muslims believe that following the Prophet Muhammad's death, leadership should have passed directly to his counsin/son-in-law, Ali bin Abu Talib. Throughout history, Shia Muslims have rejected the authority of elected Muslim leaders.
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