I think we need to understand, at a bare minimum, the idealistic way to understand Armageddon.
First, there comes the deception of sin (Chapter 13), where humanity believes the lie that it can prosper utterly independent of God, that it can forge its own utopia without any regard for religion and morality. And for a while, the lie is bought. For the drunken and fornicating teen ager and young adult is “having a good time” and it seems to them that the created goods that they deify are really going to satisfy them and that they have finally a fulfillment that they can never lose.
But the lie is unveiled in the consequences: for if man has not peace with God, if he does not love the Being that made him, that has an immeasurable love for the creature, Who has even died the worst possible suffering for the creature, Who is Infinite Gift and Love and Truth, how much more impossible will it be for man to love his fellow men, who are sinners.
and this is really the essence of the Gospel: once there is nothing left to restrain iniquity, the world would end of its own undoing, for no longer having peace with God, so then eventually peace between men breaks down, and man shall destroy himself. But, thanks be to God, our Lord and Savior shall come to intervene before the utter extinction of the Church and of the human race itself. “But those days shall be shortened, for the sake of the elect…”