Who will be the seed stock of the Gentile nations in the millennial Kingdom?

Les explains that at the end of the seven-year Tribulation, survivors remain. Many believers produced by the 144,000's preaching are martyred and resurrected later, but surviving Gentiles who heard the message and believed become the seed stock of the Gentile nations entering the Kingdom. Meanwhile, a remnant of Israel is protected southeast of Jerusalem for three and a half years, and at Christ's second coming the nation as a whole believes and becomes the seed stock of Israel. Coming into the Kingdom with Christ ruling and reigning, these Gentile believers and the saved Israelite remnant begin the millennial populations. Les teaches this thousand-year period will see tremendous population growth because Satan is locked up, sin and death are absent, and there is prosperity, food production, and ideal climate, like the Garden of Eden.