What will happen to the great empires and all that remains of them?
At Christ's Second Coming, the great empires and all that remains of them will be suddenly rolled under the pictured stone and literally blown away. They will be driven off like chaff from a threshing floor, and a 75-day period will cleanse the planet of everything that has remained.
Les explains that although much architecture, classical philosophy, courts, judges, law, and republican government came out of the Greek and Roman empires, all the remains of these ancient empires will suddenly be rolled under the pictured stone, which is Christ at His Second Coming. He will literally blow it all away. Using the harvest and threshing floor picture, Les notes that grain is separated from chaff by wind; the chaff blows away while the grain is kept. In the same way, the nations of the world, these great empires and all that remains of them, will just blow away like the chaff of a threshing floor. Les connects this to the closing verses of Daniel, where Daniel is told to wait 75 days, a period that will cleanse the planet of everything that has remained.