The character of Roger should be instrumental in making an argument against the possibility of utopia. In Chapter Four, for instance, Roger restrains his arm from throwing the stones onto the lnnocent little Henry who plays on the seashore:
Roger's arm was conditioned by a civilization that knew nothing of him and was in ruins.
Once Roger has been far enough removed from civilization in time, he he gives free rein to his sadistic nature, terrorizing Ralph when they climb the mountain as he threateningly strikes the log on which Ralph sits. Later, in Chapter 11, he laughs sadistically as he releases the granite boulder that crushes Piggy's head, sending him hurling into the sea. His actions demonstrate the unrestrained intrinsic evil in the nature of man, a nature that prohibits the possibility of any utopia.