What is going to be the case of people who were born in very remote tribes and died never hearing about Jesus?
What if some of them are very good people? They go to hell anyways?
The very reason we were put in our specific times and places in world history was to prepare all those who would receive the salvation that comes through Jesus Christ to do so:
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From one man he made all the nations, that they should inhabit the whole earth; and he marked out their appointed times in history and the boundaries of their lands. God did this so that they would seek him and perhaps reach out for him and find him, though he is not far from any one of us (Acts 17:26-27)."
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...He has appeared once for all at the culmination of the ages to do away with sin by the sacrifice of Himself (Hebrews 9:26)."
And again: "
...when the fullness of the time had come, God sent forth His Son, born of a woman, born under the law, to redeem those who were under the law, that we might receive the adoption as sons (Galatians 4:4-5)."
If this question concerns or confuses you greatly, pay close attention to the following points if you want a comprehensive logical and Scriptural resolution to the problem presented by the fate of those unreached by the Gospel.
In creating a universe that would accommodate truly free moral agents, God would have an infinite number of options available to Him with an equally infinite amount of possible outcomes. From what we know about the nature of God, He would naturally choose to create the world which would produce the greatest possible outcome. What is the greatest possible outcome? There is none other than that world which provides the circumstances which leads the largest number of souls to freely accept the grace of God through the salvation provided in Jesus Christ. From what we know about God's nature, particularly that God is omni-benevolent, omniscient and omnipotent, this can be deductively inferred as follows:
1. Because God is omni-benevolent, He would be desire to create the world which would produce the greatest potential good
2. Because God is omniscient, He would know which world would produce the greatest potential good
3. Because God is omnipotent, He would be able to create the world which would produce the greatest potential good
Therefore the world in which we exist is that which would produce the great potential good. To repeat, this greatest good is the largest number of souls that would freely surrender themselves to God and receive His grace.
Again, God would have had a literally infinite number of options present of worlds to create with an equally infinite number of outcomes. By His perfect nature, however, God would not create a world at random in which His will to create concurrently free and absolutely loved creatures was not accomplished. So God would have to narrow His options to feasible worlds which accommodate creaturely freedom and yet lovingly provides the circumstances that permits each person who would freely choose God to do so. Knowing God, once He had narrowed the options to the assortment of great results, He would naturally choose the greatest of these possible outcomes. This is not to say God is predestining our decisions, but the creation of the world which would provide the social, environmental and personal circumstances that are necessary for each individual, in their own times and places as God foreknew, to interact with each other, their environment and God in a way that corresponds to their psychology/personality, ultimately and inevitably leading to the salvation of those who would freely respond affirmatively to God's grace in whatever circumstance they find themselves. In this sense, then, God can literally be said to have elected those who are saved, though their choices as well as those who reject God are entirely free.
As is stated in Acts 17, God placed us within our context because He knew that if given that context we would freely choose to accept Him by the testimony and in-dwelling of the Holy Spirit. It could then be rightly asked "well then could God have not provided a precise set of circumstances that would be those which are necessary to win the soul of every person?", and the answer would be no. For some people, there is no such set of circumstances that would be sufficient for them to freely receive the salvation of Christ by the Holy Spirit's testimony. This is affirmed doubly in the Scriptures. First, in Daniel 12:10 concerning the course through to the end times Jesus says: "Many will be purified, made spotless and refined, but the wicked will continue to be wicked. None of the wicked will understand, but those who are wise will understand." Again, concerning God's providence Paul says in Romans 9:22: "What if God, although choosing to show his wrath and make his power known, bore with great patience the objects of his wrath—prepared for destruction?"
It may also seem confusing to think that God has among His human creation "objects of wrath" which He prepares for destruction, until you comprehend these points and Scriptures collectively. There are some souls which God would create that will freely reject Him under any and all circumstances, but are still necessary in the grand scheme of world history to play a role in drawing all those who will be freely saved into that salvation. God Himself illustrates this wonderfully in His statement to Pharaoh in Exodus 9:15-16: "For by now I could have stretched out my hand and struck you and your people with a plague that would have wiped you off the earth. But I have raised you up for this very purpose, that I might show you my power and that my name might be proclaimed in all the earth."
See Acts 17:26-27, Genesis 50:20, Jeremiah 25:8-14 and Judges 14:4 for more Scriptural examples on the providence of God and how it works.
God is perfectly just and shows no partiality (Deuteronomy 10:7, 2 Chronicles 19:7). No person is favoured, whether man or woman, rich or poor, slave or free, great or small (Galatians 3:28). Thus we can be certain that if God selects the specific times and places of every individual for the explicit purpose of preparing them to receive the salvation that is in Christ, it follows that all who extend beyond the means of receiving that salvation on account of their place or time are not victims of misfortune, but are those whom God foreknew would freely reject that salvation. Their existence then serves to play a role, indiscernible to us, in world history in maximizing the number of souls who would freely come to Christ on account of the unfolding effects and ripples of their lives.