Mystery Babylon, the Great Merchant World Power, is destroyed "in one hour"

"A new voice spoke from heaven; I heard it say, 'Come out, my people, away from her, so that you do not share in her crimes and have the same plagues to bear. Her sins have reached up to heaven, and God has her crimes in mind: she is to be paid in her own coin. She must be paid double the amount she exacted. She is to have a doubly strong coup of her own mixture. Every one of her shows and orgies is to be matched by a torture or a grief. I am the queen on my throne, she says to herself, and I am no widow and shall never be in mourning. For that, within a single day, the plagues will fall on her: disease and mourning and famine. She will be burnt right up. The Lord God has condemned her, and he has great power.

There will be mourning and weeping for her by the kings of the earth who have fornicated with her and lived with her in luxury. They see the smoke as she burns, while they keep at a safe distance from fear of her agony. They will say:

'Mourn, mourn for this great city,
Babylon, so powerful a city,
doomed as you are within a single hour...'"

Revelation 18:4-10