The Apocalypse is there where every Sentiment of Humanity it’s lost in the Blind quest of Worldly Powers.

The level of the Ferocious Beasts is where the Antagonist Forces fight each other in an avid, erroneous, and worthless quest of Satisfaction and Delight in accumulating Money.

And the last Bestial War is brought by the Devilish attempt to enchanting, subjugating, and dominating the Mass by the use of a Soulless Artificial Intelligence.

The 666 is the Number of the Beasts in the Bible. Why to use this Symbolism? To show in the only possible way, at that Time, that these are rightly Evil Spirits Digitized.

«It also forced all people, great and small, rich and poor, free and slave, to receive a mark on their right hands or on their foreheads,
so that they could not buy or sell unless they had the mark, which is the name of the beast or the number of its name.
This calls for wisdom. Let the person who has insight calculate the number of the beast, for it is the number of a man. That number is 666.»

Exegesis

…receive a mark on their right hands or on their foreheads = Authority

…they could not buy or sell unless they had the mark… = Purely concerning the Worldly Powers

…which is the name of the beast or the number of its name. = Digital representation

Let the person who has insight calculate the number of the beast, for it is the number of a man. That number is 666. = Human Artificial Intelligence