How will the millennial kingdom end?
The millennial kingdom ends by the providential acts of a sovereign God, not by human free will. Everything will go through a great turmoil, and then the new earth and new heaven will come on the scene with the same set of circumstances seen during that thousand years.
Les explains that the thousand-year millennial kingdom will end by the providential acts of a sovereign God. He notes that everything will have to pass through a great turmoil. Then the new earth and new heaven come on the scene, and the circumstances will be the same as those experienced during the thousand years. This ending is not by accident; men operate under free will without realizing God's involvement, but He has everything to do with it.