If Scout is an innocent girl who is exposed to evil at an early age and forced to develop an adult moral outlook, Jem finds himself in an even more turbulent situation. His shattering experience at Tom Robinson’s trial occurs just as he is entering puberty, a time when life is complicated and traumatic enough. His disillusionment upon seeing that justice does not always prevail leaves him vulnerable and confused at a critical, formative point in his life. Nevertheless, he admirably upholds the commitment to justice that Atticus instilled in him and maintains it with deep conviction throughout the novel.
Unlike the jaded Mr. Raymond, Jem is not without hope: Atticus tells Scout that Jem simply needs time to process what he has learned. The strong presence of Atticus in Jem’s life seems to promise that he will recover his equilibrium. Later in his life, Jem is able to see that Boo Radley’s unexpected aid indicates there is good in people. Even before the end of the novel, Jem shows signs of having learned a positive lesson from the trial; for instance, at the beginning of Chapter 25, he refuses to allow Scout to squash a roly-poly bug because it has done nothing to harm her. After seeing the unfair destruction of Tom Robinson, Jem now wants to protect the fragile and harmless.
The idea that Jem resolves his cynicism and moves toward a happier life is supported by the beginning of the novel, in which a grown-up Scout remembers talking to Jem about the events that make up the novel’s plot. Scout says that Jem pinpointed the children’s initial interest in Boo Radley at the beginning of the story, strongly implying that he understood what Boo represented to them and, like Scout, managed to shed his innocence without losing his hope.