QUICK FACTS:
People groups: 1,045
Population: 684,846,865
Unreached people groups: 666
UPG population: 586,392,830
Unengaged UPGs: 251
UUPG population: 31,592,755
Number of countries: 129
Base Religion: Christianity
Description: Roman Catholicism is the largest branch of the Christian church and is among the oldest religious institutions in the world. The Catholic Church teaches that it is the one true Church founded by Jesus Christ and that its bishops are the successors of Christ.
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