You have a misunderstanding of "the world" and who rules it. You also seem to miss that "the world," being reconciled to God in Christ, belongs to God's people:
2 Corinthians 5:19
God was in Christ, reconciling the world unto himself
John 3:16-17
For God so loved the world...God didn't send his Son into the world to judge the world, but that the world should be saved through him.
1 Corinthians 3:22
whether... the world, or life, or death, or things present, or things to come. All are yours
Romans 4:13-18
For not through the law was the promise to Abraham or to his seed that he should be heir of the world, but through the righteousness of faith. For if those who are of the law are heirs, faith is made void, and the promise is made of no effect. For the law works wrath, for where there is no law, neither is there disobedience. For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the seed, not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all. As it is written, "I have made you a father of many nations." This is before him whom he believed, God, who gives life to the dead, and calls the things that are not, as though they were. Who in hope believed against hope, to the end that he might become a father of many nations, according to that which had been spoken, "So will your seed be."
Colossians 1:16-18,20
For in him were all things created, in the heavens and on the earth, things visible and things invisible, whether thrones or dominions or principalities or powers; all things have been created through him, and to him. He is before all things, and in him all things are held together. He is the head of the body, the assembly, who is the beginning, the firstborn from the dead; that in all things he might have the preeminence...and through him to reconcile all things to himself, having made peace through the blood of his cross. Through him, I say, whether things on the earth, or things in the heavens.
So, it is clear that the
world is the Church's rightful dominion.
AGAIN, Here is the teaching of the Holy Bible Re: who is presently ruling the world:
Matthew 28:18
And Jesus came up and spoke to them, saying, All authority has been given to Me in heaven
and on earth.
Revelation 1:5
Jesus Christ...the
ruler of the kings of the earth
1 Peter 3:22
[Jesus] is at the right hand of God, having gone into heaven,
after angels and authorities and powers had been subjected to Him.
Ephesians 1:20-21
he raised him from the dead, and set him at his own right hand in the heavenly places,
Far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come
Romans 14:9
For to this end Christ died and lived again, that He might be Lord both of the dead and of the living
1 Timothy 1:17
Now to the King eternal, immortal, invisible, the only God, be honor and glory forever and ever.
Friend, Know this one simple fact:
Christianity is the supreme power and religion on the planet.
Christ is its head.
It cannot fail (Matt 16:18-19).