In the Biblical view, they were not created in a way that they would never hear about him.  They are living out choices that were made by their ancestors.  It is not the Creators responsibility to come down and correct every mistake that we make.  He has given us that option.  The judge of all the Earth will do what is right.  The ancestors will have a greater degree of accountability, but nowhere does the Bible indicate they, i.e. those living now, will ultimately go the heaven.  If they hear the message of salvation and some receive it, it is better than if the message is never heard and they all are lost.  Those who reject it are justly held to higher degree of accountability.

Knowledge of God is not “born into us”.  It says, “For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse: “  Rom 1:20