In Chapter Eleven of Lord of the Flies, Piggy suggests that Ralph blow the conch in order to assemble a meeting of the boys who have not defected to Jack's tribe. The tribe meets and decides that they must travel to Castle Rock in order to try to talk some sense into Jack.
This attempt at reason is met with extreme hostility, as Jack orders his followers to tie Ralph's boys up. Ralph demands that the boys think critically about their situation, asking, "Which is better, law and rescue, or hunting and breaking things up?" Unfortunately, his voice is drowned out by Jack yelling over him, and Jack's tribe—armed with spears—prepares to charge at Ralph's group.
What results is a terrible brawl in which Piggy is killed and Ralph is injured and forced to flee. It is clear that Jack and his boys are bloodthirsty and can no longer use common sense to justify the need for civility.