Ralph stands up to Jack at Castle Rock because he is determined to maintain order, protect the well-being of the group, and uphold the rules they have established. He confronts Jack's violent and chaotic leadership by asserting his authority as the elected chief and trying to reason with him to prevent further descent into savagery. Ultimately, Ralph's stand represents his commitment to civilization and his refusal to succumb to the brutal impulses of the boys on the island.
When Jack and his choir first marched down the beach they stopped close to the platform and Jack, alone, vaulted onto the platform to speak to Ralph. When Ralph explained that they were having a meeting and said, "Come and join in." The choir began to scatter from close line. Jack shouted, "Choir! Stand still!" The choir obeyed.
Piggy concludes that Jack does not like him or Ralph, and sees them as obstacles to his authority and leadership on the island. He believes Jack views him and Ralph as weak and inferior to himself.
The argument between Jack and Ralph shows that Ralph values order, rules, and civilization on the island. It demonstrates his natural leadership qualities and his desire to maintain a sense of democracy and fairness among the boys. Ralph's willingness to engage in conflict with Jack also suggests his ability to stand up for what he believes in and his determination to do what is right.
Jack tells Ralph's followers that they are welcome to come to his feast and even to join his tribe.
Ralph doesn't tell Jack about the glasses as Jack already knows about them, mainly because he stole them. Ralph pointed out that Jack could have had fire at any time if he'd simply asked for it but instead he'd come sneaking up like a thief and stole Piggy's glasses. Jack demanded that he repeat the accusation and when Ralph obliged Jack rushed forward and stabbed his spear at Ralph's chest. Ralph managed to block the thrust with his own spear and then swung it around to land a stinging blow to Jack's ear.
Ralph and Jack never liked each other. Once they met and Jack wanted to take the power from Ralph there was instant friction between the two. It's was obviously Ralph's job to be chief and Jack just expected to get it instead of Ralph.
Ralph, Jack and Roger search the island and climb the mountain in their search for "the beast."
He makes a stand against Jack and the choir boys because they had not acted upon their responsibility of keeping the fire going.
Early in the novel Ralph, Jack and Simon climb the mountain to ascertain if they are actually on an island. Later in the book Ralph, Jack and Roger climb the mountain in search of the beast.
Jack made no reply to Ralph's question and when Ralph turned away and led the boys towards the mountain Jack was at the back of the bunch glowering and brooding.
Most of the boys agree to join Jack's tribe, despite Ralph pointing out that he is the chief and that Jack has no shelters to use during the coming storm. Then the storm which has been building up finally breaks and Jack tells the boys to, "Do our dance! Come one! Dance!"
Most of the boys agree to join Jack's tribe, despite Ralph pointing out that he is the chief and that Jack has no shelters to use during the coming storm. Then the storm which has been building up finally breaks and Jack tells the boys to, "Do our dance! Come one! Dance!"