When will Christ return in relation to the earthly kingdom?
Christ will return at His Second Coming before the earthly kingdom is established. Scripture teaches a literal, physical, political earthly kingdom where the animal kingdom, families, and reproduction continue from believing parents. The Second Coming precedes that kingdom, so Christ returns first, then the earthly kingdom follows.
Les explains that the Bible teaches a literal, physical, yes political, earthly kingdom. That kingdom will include the animal kingdom, families, and tremendous reproduction, beginning with believing parents. He contrasts this with those who spiritualize the Scriptures and make everything pertaining to the Kingdom spiritual, refusing to accept the literal, physical, political earthly kingdom. Les notes that Christ's Second Coming is ahead of it. So the order is clear: Christ returns at His Second Coming first, and then the earthly kingdom is established.