What points does piggy try to make to jack's tribe? How do they react?

Piggy asks the other boys whether it is better to be a pack of painted Indians or to be sensible like Ralph. He asks if they would rather have rules and peaceful agreement or be able only to hunt and kill. He reminds them of the importance of Ralph's rules, which are there to ensure their rescue.

Roger, listening to Piggy from higher up on the mountain, deliberately leans his weight on the log that Robert showed him earlier, dislodging a great rock, which begins to roll down the mountainside. Ralph hears the rock falling and manages to dodge it, but Piggy can neither see nor hear its tumble. The rock crashes down on Piggy, crushing the conch shell, which he was holding, on the way. The rock pushes Piggy down a cliff, where he lands on the beach, dead.