On Guard: Defending Your Faith with Reason and Precision

by William Lane Craig

God is too good to allow someone to be lost due to historical or geographical accident.

God in His providence has so arranged the world that those who would respond to the gospel if they heard it, do hear it.

In His love and mercy, God ensures that no one who would believe the gospel if he heard it is born at a time and place in history where he fails to hear it.