The fact that he deliberately killed Piggy by rolling the rock; "Roger, with a sense of delirious abandonment, leaned all his weight on the lever (page 222)" only serves to prove this inner chaos and violent revelry. In fact, even members of the savages' tribe - esp the newly integrated Samneric - are afraid of Roger. "After a moment's silence, Sam spoke in a strangled voice. "You don't know Roger. He's a terror." (page 233)"