I interpret the “it” in this song as our republic and the “head cornerstone” as the Constitution.
Cornerstone by the Have Nots
This is for the ones standing up to the system
Yeah you know who you are, stay on point with the mission
Look to the left, the right, it all seems the same
Everybody’s pointing fingers in a blame game
And it’s a crying shame theres no change, just strain
It’s like we’re all in such a rush to flush it all down the drain
We gotta take it down brick by brick until we find the head cornerstone
We gotta polish it up ’til it shines like it once shone.