Satan Dies the Second Death

After the millennium which follows Jesus's second coming, Satan will be destroyed in the second death. But why doesn't God destroy Satan before then?
How is God dealing with the problem of evil, and with Satan himself? What is the final step in the cosmic conflict?

God ensures that judgment is always fair. Even the wicked will confess that God's judgments are righteous and that He is a true and fair King. In this lecture, Kameron DeVasher explores the difficult concepts relating to sin's place in the universe and why the immediate destruction of Satan, even at the second coming of Christ, does not fit into God's amazing plan of redemption.