Hierarchy made me think of a struggle for power. And to me a struggle for power usually means a war. I know by true definition it means ranks or grades. But I think anywhere you have ranks or grades you'll find someone struggling to move up, gain more power. Now that doesn't always have to mean war, but, more often than not it does.
My scanner stinks for picking up the nuances and subtleties of pencil strokes - bummer. I do still like the scanner though - go figure.