The sudden collapse of powerful world leaders often serves as a dramatic opening for the revelation of absolute divine authority. When a mighty nation loses its human leadership, the resulting void makes way for a profound recognition of who truly controls the course of history. The primary approach among commentators is that the establishment of God's throne signifies His exclusive sovereignty. With the complete loss of Elam's human government, God alone will rule over them, ensuring that everyone recognizes that all historical events are directed by Him [מצודת דוד, מלבי״ם, רד״ק]. Alternatively, this throne can be understood as a symbol of justice, representing a seat of judgment from which God evaluates the nation [ביאור שטיינזלץ]. Taking a more metaphorical approach, the concept of the throne can also represent a strict military siege that God orchestrates against Elam [רש״י].
The foundation of this divine rule is built upon the total destruction of the local royalty and officials. While this refers simply to the wiping out of the regional government, the Sages connect this downfall to the events of the Book of Esther, which unfolded in the very same region of Elam. In this historical context, the fallen royalty points specifically to Queen Vashti, while the destroyed officials refer to Haman and his ten sons. The elimination of these specific individuals was a deliberate move by God designed to protect and benefit the people of Israel during their exile. Ultimately, their destruction served as clear proof to the world that true salvation comes directly from Him [רד״ק].