For all nations have drunk of the wine of the wrath of her fornication - See the notes on Revelation 14:8. This is given as a reason why this utter ruin had come upon her. She had beguiled and corrupted the nations of the earth, leading them into estrangement from God, and into pollution and sin. See the notes on Revelation 9:20-21.
And the kings of the earth have committed fornication with her - Spiritual adultery; that is, she has been the means of seducing them from God and leading them into sinful practices.
And the merchants of the earth are waxed rich through the abundance of her delicacies - The word rendered “abundance” here, means commonly “power.” It might here denote influence, though it may also mean number, quantity, wealth. Compare Revelation 3:8, where the same word is used. The word rendered “delicacies” - στρῆνους strēnous - occurs nowhere else in the New Testament. It properly means rudeness, insolence, pride; and hence “revel, riot, luxury.” It may be rendered here properly as “luxury,” or “proud voluptuousness”; and the reference is to such luxuries as are found commonly in a great, a frivolous, and a splendid city. These, of course, give rise to much traffic, and furnish employment to many merchants and sailors, who thus procure a livelihood, or become wealthy as the result of such traffic. Babylon - or papal Rome - is here represented under the image of such a luxurious city; and of course, when she falls, they who have thus been dependent on her, and who have been enriched by her, have occasion for mourning and lamentation. It is not necessary to expect to find a literal fulfillment of this, for it is emblematic and symbolical. The image of a great, rich, splendid, proud and luxurious city having been employed to denote that anti-Christian power, all that is said in this chapter follows, of course, on its fall. The general idea is, that she was doomed to utter desolation, and that all who were connected with her, far and near, would be involved in her ruin.