Who populates the Millennium as mortals?

I am having difficulty reconciling several End Times passages together, so let's see if anyone can help me. There's a lot to quote from, so I'm removing the white space. I hold to pre-Millennial beliefs. My trouble lies in determining who the mortals will be during the Millennium, as you can see in the following passages: > I tell you this, brothers: flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable. Behold! I tell you a mystery. We shall not all sleep, but we shall all be changed, in a moment, in the twinkling of an eye, **at the last trumpet**. For **the trumpet will sound, and the dead will be raised imperishable, and we shall be changed. For this perishable body must put on the imperishable, and this mortal body must put on immortality.** When the perishable puts on the imperishable, and the mortal puts on immortality, then shall come to pass the saying that is written: **'Death is swallowed up in victory.'** 'O death, where is your victory? O death, where is your sting?' > (1 Corinthians 15:50-55)

> And another angel, a third, followed them, saying with a loud voice, '**If anyone worships the beast and its image and receives a mark on his forehead or on his hand, he also will drink the wine of God's wrath, poured full strength into the cup of his anger**, and he will be tormented with fire and sulfur in the presence of the holy angels and in the presence of the Lamb. **And the smoke of their torment goes up forever and ever, and they have no rest, day or night, these worshipers of the beast and its image, and whoever receives the mark of its name.**' > (Revelation 14:9-11)

> **And I saw the beast and the kings of the earth with their armies gathered to make war against him who was sitting on the horse and against his army.** And the beast was captured, and with it the false prophet who in its presence had done the signs by which he deceived those who had received the mark of the beast and those who worshiped its image. These two were thrown alive into the lake of fire that burns with sulfur. **And the rest were slain by the sword that came from the mouth of him who was sitting on the horse**, and all the birds were gorged with their flesh. > (Revelation 19:19-21)

> Then I saw thrones, and seated on them were those to whom the authority to judge was committed. Also I saw the souls of those who had been beheaded for the testimony of Jesus and for the word of God, **and who had not worshiped the beast or its image and had not received its mark on their foreheads or their hands. They came to life and reigned with Christ for a thousand years. The rest of the dead did not come to life until the thousand years were ended.** This is the first resurrection. Blessed and holy is the one who shares in the first resurrection! Over such the second death has no power, but they will be priests of God and of Christ, and they will reign with him for a thousand years. > (Revelation 20:4-6)

> '**For behold, I create new heavens and a new earth, and the former things shall not be remembered or come into mind.** But be glad and rejoice forever in that which I create; for behold, I create Jerusalem to be a joy, and her people to be a gladness. I will rejoice in Jerusalem and be glad in my people; no more shall be heard in it the sound of weeping and the cry of distress. **No more shall there be in it an infant who lives but a few days, or an old man who does not fill out his days, for the young man shall die a hundred years old, and the sinner a hundred years old shall be accursed.** They shall build houses and inhabit them; they shall plant vineyards and eat their fruit. They shall not build and another inhabit; they shall not plant and another eat; for **like the days of a tree shall the days of my people be**, and my chosen shall long enjoy the work of their hands. They shall not labor in vain or bear children for calamity, for they shall be the offspring of the blessed of the LORD, and their descendants with them. Before they call I will answer; while they are yet speaking I will hear. The wolf and the lamb shall graze together; the lion shall eat straw like the ox, and dust shall be the serpent's food. They shall not hurt or destroy in all my holy mountain,' says the LORD. > (Isaiah 65:17-25) That verse, Isaiah 65:20, is the one that brings me the most difficulty. If the saints and everyone who doesn't worship the Antichrist rule and reign with Christ for 1,000 years, and after those 1,000 years death is defeated forever (Revelation 20:14; 21:4; Isaiah 25:7-8), then ***who are these people that are dying 100 years young or older in the future, presumably during the Millennium, as mortals***? It seems like a black and white situation during the Great Tribulation: you either believe and resist the beast or you don't. Can someone explain how all this works to me? Thanks. Some passages that may be relevant: > Then everyone who survives of all the nations that have come against Jerusalem shall go up year after year to worship the King, the LORD of hosts, and to keep the Feast of Booths. > (Zechariah 14:16) > > Therefore a curse devours the earth, and its inhabitants suffer for their guilt; therefore the inhabitants of the earth are scorched, and few men are left. > (Isaiah 24:6) > > For thus it shall be in the midst of the earth among the nations, as when an olive tree is beaten, as at the gleaning when the grape harvest is done. > (Isaiah 24:13) > > On this mountain the LORD of hosts will make for all peoples a feast of rich food, a feast of well-aged wine, of rich food full of marrow, of aged wine well refined. And he will swallow up on this mountain the covering that is cast over all peoples, the veil that is spread over all nations. **He will swallow up death forever;** and the Lord GOD will wipe away tears from all faces, and the reproach of his people he will take away from all the earth, for the LORD has spoken. > (Isaiah 25:6-8) > > Thus says the LORD: I have returned to Zion and will dwell in the midst of Jerusalem, and Jerusalem shall be called the faithful city, and the mountain of the LORD of hosts, the holy mountain. Thus says the LORD of hosts: **Old men and old women shall again sit in the streets of Jerusalem, each with staff in hand because of great age**. > (Zechariah 8:3-4) > > Then Death and Hades were thrown into the lake of fire. This is the second death, the lake of fire. And if anyone's name was not found written in the book of life, he was thrown into the lake of fire. > (Revelation 20:14-15) I also have an interesting theory, based on the wording of several verses in 2 Peter 3, that the last trumpet isn't blown until many years after the Tribulation, and in several cases where it says "in/on that day" it's referring to the "day of the LORD" as the 1,000 year Millennium. Just a theory.