As the only unrecognizable empire prophesized by Daniel, the fourth Gentile empire was portrayed as militarily strong and not
uniformly united (Dan 2:40-43).
An angel would inform Daniel that this kingdom was different from all other kingdoms, devour the whole earth, and
crush it (Dan 7:23).
In the book of Revelation, Daniel's fourth empire is described as "Babylon the Great, The Mother of Harlots, and Of the Abominations
of the Earth" (Rev 17:5). This identification of the fourth empire is confirmed by the
loud voices in heaven rejoicing when the seventh trumpet sounds, "the kingdom of the world has become the kingdom of our Lord and of His
Christ" (Rev 11:15).
What the angel describes figuratively as "Babylon," the apostle John would describe in the words of Jesus as "the world."
Do not love the world nor the things in the world. If anyone loves the world, the love of the Father is not in
him. For all that is in the world, the lust of the flesh and the lust of the eyes and the boastful pride of life, is not from the Father,
but is from the world. The world is passing away, and also its lusts; but the one who does the will of God lives forever.
(1 John 2:15-17)