Recently I have been thinking about the size of the population that will live on Earth during the 1,000 year reign of Christ. I have come to the conclusion that it will be huge. Even if there are only a few million people left at the end of the tribulation, there could still be trillions by the end of the millenium. A thousand years of peace, free of disease, and a healthy birth-rate could easily produce such numbers.
This made me realize that it is possible that the majority of the people who are ever born become true believers. In our age only a minority of people become true believers in Jesus, but during the Millennium who knows?