Savagery vs. Civilization

The book repeatedly contrasts the 'bloodthirsty savages' and their violent customs (cannibalism, warfare) with the civilized, Christian way of life, suggesting a hierarchy of cultures.

The peaceful, orderly life of the boys is violently interrupted by the arrival of war canoes and the brutal cannibalistic acts of the natives, starkly contrasting civilized and savage behavior.

The contrast between the natives' cannibalistic tendencies and the boys' efforts to enforce civilized behavior is highlighted.

The pirates are depicted as 'white savages,' contrasting their brutality with the boys' civilized cooperation and morality.

The pirates' brutality and lawlessness contrast with Ralph's moral courage and the order of civilized society.