What does Ralph need to think about in the start of chapter 5?

Ralph goes to the beach because he needs a place to think and feels overcome with frustration and impotence. He understands the weariness of life, where everything requires improvisation. Ralph decides to call a meeting near the bathing pool, realizing that he must think and must make a decision but that he lacks Piggy's natural intellectual ability.Ralph realizes that he must impose his own agenda, like Jack imposes his, or he will loose these boys forever.