The god of this age (world) has blinded the minds of unbelievers, so that they cannot see the light of the gospel that displays the glory of Christ, who is the image of God.
I Corinthians 4:4
When Scripture teaches that “Satan is the God of this world,” what one needs to understand is that Paul is using “world” in a technical fashion. “World” here means “as this world lies in Adam.” It is a truism that as this world lies in Adam Satan is the God of that world. However, what it does not mean is that Satan is over planet earth. To not see that distinction would give us a contradiction with Scripture that teaches that the Lord Christ is in possession of “all authority” in heaven and on earth as well as those passages that teach that the “Lord God omnipotent reigneth.” Obviously St. Paul is not introducing some kind of Manichean dualism by positing two competing Gods … one over things not of this world and one over this world.
St. John quotes Christ as saying, “Now is the time for judgment on this world; now the prince of this world will be driven out.” In the work of the Cross Satan was driven out. He has no power except to those who are of their Father the Devil, but even then, just as with Job, Satan is a permission seeking being in terms of his designs and intent. The Devil is merely God’s attack dog on a long leash.
So, dear Christian, there is no room for surrendering anything in the Cosmos to Satan as if he has right of authority because he is “the god of this world.” Satan is the god of the dung heap, of falsity, of fiat non-reality. He has no hold over this world because in the death, resurrection, and ascension of Christ, God has and intends to continue to redeem the whole Cosmos so that it is even more than Eden ever was.
The age to come has come in Christ and is rolling back this present wicked age that has the prince of the power of the air as its Captain. This mopping up exercise is fait accompli. The “God of this age” is a grifter and the only weapons he has are smoke, delusion, and intimidation. Greater is He that is in us than he that is in the world.
Satan as “God of this world?” Only in the sense that a rebellious three year old thinks he is the “God of his bedroom,” in defiance of his parents placing him there for discipline.