Why is it that Piggy's appearance does not change (i.e. his hair never grows and his weight never changes) throughout the book?
Piggy, in Lord of the Flies, is the one character who refuses to compromise his morals and civilized nature in the novel. As more time goes by on the island, the boys' hair grows, mirroring their slow descent into savagery and loss of civilization. In the novel, it states:
"He [Piggy] was the only boy on the island whose hair never seemed to grow. The rest were shockheaded, but Piggy’s hair still lay in wisps over his head as though baldness were his natural state and this imperfect covering would soon go, like the velvet on a young stag’s antlers”
This distinction is important, because Piggy is the only boy who does not lose his grip on society and civilization. From the beginning, he is determined to keep the boys organized and civilized; he is the one who first realizes that the conch could be used to call all the boys together, assigning it the symbolic importance of order and society. Until his murder by Roger, a character who has lost all grip on civilization and completely descended into savagery, Piggy maintains his need and desire for order. In fact, he is holding the conch, "the talisman, the fragile shining beauty of the shell" when Roger releases the rock and destroys Piggy and the conch, effectively destroying any trace of civilization left on the island