God's absolute kingship over the entire world ultimately reveals itself through the historical relationship between the Israelites and the surrounding nations. When the world recognizes His authority, a profound shift occurs in the global balance of power, leading to the submission of other empires.
The primary approach among commentators views this dynamic as an act of divine leadership. God will guide the nations of the world just as a shepherd leads a flock [רש״י, מצודת ציון, אבן עזרא]. This global guidance serves as a powerful reminder that God is the King over all the earth, holding everything firmly in His hands [אבן עזרא]. Expanding on this vision, some suggest that God will gather these nations from the farthest corners of the earth and lead them directly to Jerusalem [רד״ק].
However, this divine guidance is understood by others through the lens of conquest and submission, specifically pointing to the historical conquest of the Land of Israel [ביאור שטיינזלץ]. In this view, the nations are not led willingly, but rather through forceful and necessary intervention [מלבי״ם]. Taking a more severe approach, another interpretation suggests that God will direct a plague toward the nations in place of the Israelites. These nations will act as a ransom, absorbing the punishment and calming God's anger [רש״י]. In stark contrast to themes of force or plague, the Sages offer a vision of peace, explaining that this divine action will actually be carried out with profound gentleness and tranquility [תורה תמימה].
As this global shift takes place, a careful distinction is made regarding the fate of different societies. Regular nations will simply find themselves placed under the authority of the Israelites. However, kingdoms steeped in idol worship face a much harsher reality. Because of their idolatrous practices, these specific empires will be completely and utterly subdued, placed firmly and literally under the feet of the Israelites [אלשיך].