Both Simon and Piggy died as a result of the chaos and savagery that overtook the boys on the island. Simon represented the mystic believer who understood things to a greater degree than the others did. Piggy represented the intellect and common sense. Both boys stood for the opposite of the evil that was taking over the boys and the island. Simon died in chapter 9 when he ran into the circle of boys dancing in a frenzy around the fire. In their mob mentality stirred by the dancing frenzy, the boys fell on Simon and killed him - calling him "the beast". Simon probably wouldn't have been killed if not for what the boys were doing at that moment. Piggy was killed in chapter 11 while trying to talk sense into Jack and his henchmen. Piggy's death was deliberate but still occurred in a moment of madness. Roger purposely leaned on the lever, dislodging the boulder that killed Piggy, but Roger had become fully savage at this point. As Roger listened to Jack, Ralph and Piggy argue, "...Roger, with a sense of delirious abandonment, leaned all his weight on the lever." The savage beast within the boys took over the minds and the hearts of the boys and this resulted in the deaths of Simon and Piggy, as well as the deaths of mystic enlightenment and reason.