What will become of the billions of folks who, having never heard anything whatsoever about Jesus Christ, have not accepted Jesus?
I look at the Book of Job, Acts 17, and Romans 1 and perceive that there are people who have never heard the gospel, yet have observed and acknowledge through creation (Psalm 19) that God exists and He is essentially virtuous. These people believe there is a God they cannot know, and they are never comfortable with the gods of their native cultures. In Job 9, we see that Job does not know the name of Jesus, but he knows he needs Jesus.
I see in the book of Jonah and in the words of Jesus (such as in Luke 12) that God's judgment takes into consideration how much a person knows about Him.
I know from 1 Timothy 2 that God is not a dispassionate arbiter, He is not an unbiased judge, but rather God is biased
toward salvation. We have to stop and think about the implications of that verse. God is
biased toward salvation.
I am an Inclusivist, along with CS Lewis and Billy Graham. If salvation were so strictly dependent on hearing the gospel from an evangelist, then that would take salvation of the world out of the hand of God and put it into the hands of men. I think that God knows the hearts of every person, and He knows those who would have accepted the gospel if someone had gotten it to them.
I do believe "membership has its benefits," and that being a member of the Body of Christ provides benefits in this world that being a lone believer in an Unknown God cannot enjoy.