QUICK FACTS:
People groups: 283
Population: 217,308,165
Unreached people groups: 273
UPG population: 305,818,465
Unengaged UPGs: 129
UUPG population: 9,778,265
Number of countries: 68
Base Religion: Christianity
Description: Orthodox Christianity includes Copts, the Assyrian Church of the East, Eastern Orthodox Churches and Oriental Orthodox Churches. These traditions split from the Roman Catholic Church over doctrinal, cultural and linguistic differences. The Orthodox Church considers itself the present-day continuation of the theology and practice established by Jesus Christ through his Apostles.
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