Global Frontier Missions explains UPG's & UUPG's well.

Unreached People Groups

UPG’s and UUPG’s: Today there are still many ethno-linguistic people groups with little or no opportunity to hear the Gospel. The vast majority (95%) of these least reached groups exist in the 10/40 window and less than 10% of missionary work is done among these people.

Featured Project

Jericho Teams