How do we know that Jesus is the true king of all nations?

Jesus is recognized as the true king of all nations through His fulfillment of Old Testament prophecies and His sovereign rule over both Jews and Gentiles. In Psalm 2, God declares Jesus as His Son, exalted above all rulers. His role as head of the nations is seen in the fulfillment of the promise made to David, but brought to completion in Christ’s death and resurrection. Philippians 2:9-11 emphasizes that every knee will bow before Jesus, showcasing His ultimate authority over all creation. This truth reassures believers of their place in His unifying kingdom, where all nations will acknowledge His lordship.