The Great Abdication, the Millennial Age, and the Perfect Age between which the earth is restored by fire makes up the Age of Ages which is the time called the Kingdom of the Son of Man.
At the close of the Age of Ages is when Christ shall have put down all rule and all authority and power. He must reign until He has put all enemies under His feet; then the Son of Man shall surrender the Kingdom of God to the Father that He may be all in all. This is known as the Great Abdication.