People groups = Nations (ethne in Greek)
Nations is a key Biblical word:
“in you all the nations of the earth will be blessed”
“as a witness to all the nations and then the end will come”
“for the healing of the nations”
Definition: “For evangelization purposes, a people group isthe largest group within which the Gospel can spread as achurch planting movement without encountering barriers ofunderstanding or acceptance."
Isaan of Thailand: 18.6 million, Buddhist, unreached