Question for Christians and whoever else wants to comment about people and Hell?

So if there is a pure hearted individual in some remote country that has never heard of Christianity or Jesus or anything relating to the religion and they go about living their life the best they can when they die are they automatically sent to hell for not "accepting the Lord" though they never even heard of him/her because that sounds like a grave injustice for the just and fair omnibenevolent Lord right?