Thanks! That's what I though too cos of the lyrics. His worries of the generation: “Lord, help this generation/ Help them love one another, Lord, and understand/ You know this generation, is getting out of hand”, could of course refer to the riots in Watts, but if it's late 1967 it could be Detroit, or if it's late 1968, it could be riots after the killing of Martin Luther King.
I'm gonna use this in a book. Is there a way to be 100% sure?