Roger and Maurice are the ones that attack Jack and Piggy because Jack wants Piggy's glasses.
For Piggy's glasses, which means the infinite power of fire.
Simon retrieved Piggy's glasses for him, after they had fallen onto the rocks as a result of Jack punching Piggy.
Jack attacked Piggy rather than Ralph because he knew Piggy wouldn't fight back. If he had attacked Ralph there was a good chance that Ralph would have beaten him and Jack couldn't take the risk of losing face in front of his own hunters.
After Jack leaves to go to Castle Rock, Piggy becomes more confident with himself, and starts to stand up for himself. This happens because Jack stole Piggy's glasses, and now he can no longer hide behind his disability of not being able to see.
Jack and his tribe.
Roger and Maurice are the ones that attack Jack and Piggy because Jack wants Piggy's glasses.
For Piggy's glasses, which means the infinite power of fire.
Jack took Piggy's glasses.
Jack participates in the violent attack on Piggy by encouraging his followers to roll a large boulder onto him, ultimately causing his death. This act shows Jack's ruthless and power-hungry nature as he seeks to eliminate anyone who challenges his authority on the island.
Simon retrieved Piggy's glasses for him, after they had fallen onto the rocks as a result of Jack punching Piggy.
Jack attacked Piggy rather than Ralph because he knew Piggy wouldn't fight back. If he had attacked Ralph there was a good chance that Ralph would have beaten him and Jack couldn't take the risk of losing face in front of his own hunters.
Jack and his followers steal piggy's glasses.
Jack's boys do not attack Ralph's boys at any point in the book. Roger and Maurice accompany Jack on a night time raid on the shelters but the purpose is not 'attack' anyone but simply to steal Piggy's glasses. Even when Ralph, Samneric & Piggy go to castle rock to demand the return of Piggy's glass although they are vastly outnumbered by Jack's tribe they are not attacked.
Jack attacked Piggy because he was power-hungry and saw Piggy as a threat to his authority over the boys. Jack was determined to maintain control and saw Piggy's intelligence and reason as a direct challenge to his savage rule. This led to an escalation of tension and ultimately resulted in Jack lashing out violently against Piggy.
Piggy claimed that they had nothing to do with the attack/murder of Simon.
Jack's attack on Piggy and the breaking of one of the lenses in his spectacles symbolize the degeneration of the group because at one time the group was whole and all together and then they started to break away from the big group just like Piggy's glasses once were one full piece of glass and then they got broken apart.