The word is (...) (archon), and occurs in the New Testament 37 times. It is used of earthly rulers, and spirit rulers of this age; also of Christ (only of Christ) in relation to the earth; but never in relation to or in connection with the Church.
He it is of whom His God and Father has declared, "I will make Him my first-born, higher than the kings of the earth" (Ps. lxxxix.27).
It is in connection with the earth that He comes, in Revelation, and hence this title is used. Another testimony to the truth of our proposition.