A nation which accepts the gospel in terms of widespread belief in Jesus Christ in accordance with the Scriptures within its population will eventually experience material blessing along with scientific and technological advancement. The best example of this might be the United States of America, founded centuries ago by pilgrims from England who were seeking to worship their Lord Jesus Christ freely. She would later of course become the richest and most powerful nation in the history of the world.
But material blessings, ironically, will eventually and inevitably bring spiritual complacency within the nation. Being human, many of not most people in the nation will begin to focus on the material blessings instead of the ultimate source of the blessings—God. “Many are invited, but few are chosen.” The gospel slowly but surely becomes an established “religion” with its rules and traditions—and is dead in terms of imparting LIFE.
Dead religion will lead to the majority in the nation turning away from God, even denying His existence. In the absence of absolute morality, perversions of various kinds will be accepted by the culture (Romans 1)—as is now taking place in America and the West—and become mainstream even within the “conservative” media.
What then is the purpose of the gospel in the life of a nation? It is to reap a harvest of souls from that nation—that is, those who names were already “written in the book of life from the creation of the world” (Revelation 17:8). Once the harvest pre-determined by God is complete in that region, the primary focus of the life-giving gospel moves on to regions of the world where the harvest is still scant or non-existent—for example, in the Third World where the stifling darkness of Islam, Hinduism, Buddhism, idolatry, and witchcraft reigns—and where the gospel has never been heard. Following the reaping of the harvest in those regions and the final gleaning of the harvest in already “christianized” nations in the West, the end will come.
Matthew 24:14 “And this gospel of the kingdom will be preached in the whole world as a testimony to all nations, and then the end will come.”