Final answer:
Ralph considers the others mutinous as they resist the established rules and support Jack's rival leadership, indicating a division and breakdown of order in their society.
Step-by-step explanation:
Ralph feels the others are being mutinous because they are refusing to follow the established rules and are instead supporting Jack's leadership. Mutiny, in this context, is the act of openly resisting authority and implies a deliberate and collective effort against the established leadership. Ralph's perception of mutiny reflects a breakdown in order and the emerging division between himself and Jack, leading to the disintegration of their society's structure. Considering Ralph's dedication to order and civilization, the boys' shift towards Jack's way of life, which emphasizes savagery and hunting over stability and structure, feels like a betrayal of their initial agreements, hence a mutiny.