who killed piggy in lord of the flies

Piggy was killed by Roger in Lord of the Flies. During a confrontation at Castle Rock, Roger dislodges a large boulder that strikes Piggy, shattering the conch shell he is holding and knocking him off a cliff to his death on the rocks below. This act symbolizes the complete breakdown of order and civility on the island, as Piggy represents reason and the conch symbolizes authority and governance. Roger's violent action marks the descent into savagery among the boys