The Bible’s last book, Revelation, indicates that up to a certain date there would be seven such world powers having to do with Jehovah’s witnesses, these, in the order of their rise to dominance, being (1) Egypt, (2) Assyria, (3) Babylon, (4) Medo-Persia, (5) Greece, (6) Rome, and (7) the Anglo-American world power of today.
... Furthermore, Ezekiel’s prophecy pictures this as Jehovah’s fight against Gog, hence against Satan the Devil, thus making it a fight between the true God and the false, between the God of the righteous new world and the “god of this world.” (2 Cor. 4:4)