Is it true that 666, Antichrist is not a single organization or entity but many?

The antichrist is anybody who denies Jesus is the Christ.Therefore there are many antichrists.The false prophet is whom is mentioned as a false Christ is an individual who claims to be God.The four you speak of are world empires consisting of the remains of the empires before them- Persia, Then Greece whom conquered and usurped Persian Empire.Then Rome Usurped Greece. Next: European economic revival of old roman confederacy including all peoples related to the former Roman provinces and their former colonies.A power block no country in the world can overpower.Plus an already in place goofy religion {according to Jewish scriptures} probably worldwide Christianity With of course the false prophet dictating to everyone. Don't worry, you will like him {at first}