Revelation 17:10 says “And there are seven kings: five are fallen, and one is, and the other is not yet come; and when he cometh, he must continue a short space.”
The best place to begin is to start from the beginning. Daniel chapter 7 speaks of four beasts coming out of the sea. These beast as we understand it are Nebuchadnezzar, the second beast was Darius the Mede and Cyrus, the third beast was Alexander and his Generals; the fourth beast was Rome and Arabia, along with the ten nations of Europe, the sea is Mediterranean, but the sea in the Bible are people groups. Revelation 17 speaks of seven heads and ten horns on the beast. Verse 10, says “And there are seven kings: five are fallen, and one is, and the other is not yet come, and when he cometh, he must continue a short space.” Now there are some that hold the teaching that the seven heads are the Seven Hills of Rome, but they can’t show that five of the hills have fallen down. We must also be careful to understand that these heads are taken from the book of Daniel; it’s not an account of the early captivities under Egypt or Assyria because it starts with Babylon as the head of Gold in chapter two of Daniel. The seven heads are as follows:
5. The Generals,
7. And Arabia.
The Bible says five are fallen, Babylon through the Generals has fallen; Rome was in power when the Apostle John was writing Revelation. Rome became officially divided in 476 A.D. into the east and west Empire, the pinnacle of Roman occupancy at its breaking point. During that time the ten horns that were on the beast scattered into the territorial frame of the Roman Empire:
These ten horns had time to scatter during the reign of the seventh head on the beast, which was Arabia. In chapter two of the book of Daniel, it says that the “iron” shall “mingle” themselves with the seed of men. The word mingle in the Hebrew means “Arab”, where we get the word Arabia; so while the false prophet Mohammad starts this head; the Germanic tribes of Europe scatter adding mixture to the iron of the beast.
-Anthony D. Booker