The answer is: A prophecy of the future kingdom after the return of Christ

Psalm 72 - Often viewed as a messianic psalm, it describes the ideal reign of a righteous king whose rule brings justice and peace. This vision aligns with prophecies in Isaiah (Isaiah 9:6-7) about the coming Messiah, emphasizing God's ultimate plan for restoration and unity through Christ.

Psalm 72 paints a vivid picture of a ruler who embodies righteousness and justice, embodying ideals that resonate deeply not only with believers but also with those who yearn for a more just and peaceful world. This psalm opens with a prayer for the king, asking God to grant him wisdom and justice. It's fascinating to note that the characteristics described in Psalm 72 echo the themes throughout the Bible, well beyond just its immediate context.

Additionally, many see it as a prayer that could extend beyond just a single monarch to highlight principles of good governance. As you read the lines about the king reigning with peace, defending the oppressed, and how 'his reign will be as long as the sun' (Psalm 72:17), think about how timeless and universal these ideals are. Has any serious governance ever turned a blind eye to promoting ‘peace’? Here lay seeds not just for Christian messianic interpretations but universal principles that transcend religious boundaries.

What’s even more intriguing is *who* might have penned it. Traditionally attributed to Solomon, the psalm relishes in the actions of a leader skilled not only in authority but in compassion. This framing aligns with narratives about leadership seen in both ancient scriptures and contemporary thought. Thus, Psalm 72 not only stands as a pillar in the discussion around justice but serves as a reminder of what true leadership should look like—a just ruler works for the betterment of all, according to ethical values that continue to inspire governance today.