Buried amidst all the specific prophesied judgments of Zephaniah 2 is this more general statement: “The Lord will … famish all the gods of the earth, and to him shall bow down, each in its place, all the lands of the nations.”
We should never forget as we read the scriptures that the rise and fall of nations, past and present, is not merely the product of the ingenuity of human generals or the whims of the kings of the earth. Joe Biden and Vladimir Putin are not the people calling the shots. Behind the scenes lie the principalities and powers, the “gods ['ĕlōhîm] of the earth”. In pitting nation against nation, God is displaying his superiority to and sovereignty over every spirit being in the universe, no matter how powerful or influential. He promises to “famish” or starve them, diminishing their glory and demonstrating their relative insignificance.
The rest of the chapter is the evidence that backs up this statement.