Imagine, if it please you, an Earth 1500 years after a catastrophic, near-extinction-level event. Humanity has gone through another population bottleneck (say, maybe only ~200,000 survived, scattered widely throughout the globe) and is bouncing back. That we once had cell phones, nuclear power, and artificial intelligence is mere legend.
But agriculture has survived, and with the reduced environmental pressure from humankind, the Earth has become an abundant place. People can eat, and build shelter. City-states and regional powers are re-emerging.
The words to this anthem don't mean what they mean in English. "Anthem" doesn't even mean "anthem," let's say it means "a deep feeling of attachment to a particular place." Go ahead and make up meanings for the other 9 words.
This song's words were written by an anagram generator, used so I could illustrate some letters I drew.