The fact that the rules of civilized society are breaking down on the island is illustrated by the escalation in Jack and Roger's bullying of Piggy and the littluns in Chapter 4.
The increase of Jack and Roger's abuse of Piggy and the littluns in Chapter 4 demonstrates how the rules of civilized society are breaking down on the island.
In 'Lord of the Flies,' the disintegration of civilization is exemplified by Jack and Roger's growing bullying, which shifts from civilized norms to savage behavior.
The downfall of civilized society is shown in Chapter 4 of Lord of the Flies by the increase of Jack and Roger's bullying of Piggy and the littluns.
This indicates a trend away from structured social interactions and towards power enforcement by intimidation and violence.
As the guys stray further from society's laws, their actions become more heinous, exposing the underlying theme of human brutality when societal structures are violated.