What can I write about in a letter to Jack from Ralph?
It would be best to analyze Ralph and Jack's relationship throughout the novel before drafting the letter and take into consideration which stage of the story Ralph would be addressing Jack from. The two characters feel differently about one another as the novel progresses. In the beginning of the novel, Ralph gets along well with Jack. If Ralph was writing a letter to Jack at the beginning of the story, he would probably generously ask for Jack's opinion and help lead the group of boys. Ralph would more than likely have an open mind to Jack's ideas and would appreciate feedback from him.
As the story advances, Jack becomes increasingly jealous of Ralph and attempts to usurp his power. Ralph quickly becomes frustrated and agitated when dealing with Jack. Ralph realizes that Jack is a jealous, polarizing figure who is trying to gain power. If Ralph were to write Jack a letter in the middle of the story, it would be best for Ralph to threaten Jack with punishment for his insubordination. Ralph would have to assert his power by setting clear limits and addressing Jack's negative behavior. Ralph would also benefit from attempting to include Jack in some of his future decisions to appease his thirst for power.
By the end of the novel, Jack is a tyrannical leader who is attempting to hunt and kill Ralph. If Ralph were writing him a letter at the end of the novel, it is possible that Ralph would probably beg for mercy and agree to become a subordinate member of Jack's tribe in order to survive.