Piggy has always represented the logical element in Lord of The Flies and often wonders what his "auntie" would do; always considering the "grown up" perspective. As time passes and it is evident that Ralph is losing control, Piggy finds strength in the power of the conch. Even when Jack and his "tribe" have stolen Piggy's glasses to make a fire and rendered him almost helpless as he can barely see, he still feels that the conch commands respect and speaks up when he has the conch in his hand. He is tired of Jack's childish behavior and lack of respect for authority - the authority granted to Ralph when he was voted chief.
Simon is dead and Ralph and Piggy have confronted Jack to demand the return of Piggy's glasses but Jack and his "tribe" take little notice and want to fight, having tied up Samneric and threatened Ralph. Piggy accuses them of "acting like a crowd of kids" (ch 11) but by now they are "savages" and will not listen to reason, with tragic results. Symbolically, Piggy is hit by the rock and the conch explodes simultaneously, ending all hope.