The song is about breaking out of the status quo. The people that set up the status quo, "line in the sand put there by the man", and the people reaping the rewards of the status quo "children built the castles made of stone", the people who don't do anything about it and just talk about it "man in the sky". Then there's the people who actually change the status quo and endure "battle scars", the child. Then the leading to the changing of everything and the unraveling of the status quo (when the song picks up pace).
The song is about breaking out of the status quo. The people that set up the status quo, "line in the sand put there by the man", and the people reaping the rewards of the status quo "children built the castles made of stone", the people who don't do anything about it and just talk about it "man in the sky". Then there's the people who actually change the status quo and endure "battle scars", the child. Then the leading to the changing of everything and the unraveling of the status quo (when the song picks up pace).