Chapter 11

Roger is a socio-path. The fine line between the thin rules of civilization and reckless abandon of "nameless authority" quickly vanishes for this boy. He is content to throw stones at Henry barely missing him because of some unspoken conditioning in the back of his mind. This disappears by the time he lops a boulder on Piggy's head. In your quote, Roger feels the sense of violent abandon finally destroy any remnants of the old world that he may still have.