Why is bravery important to Jem?

Jem's reasons for demonstrating bravery change and grow along with his character in To Kill a Mockingbird. In the first chapter, it is clear that the appearance of bravery is important to Jem. Dill dares Jem to touch Boo Radley's house. Scout recalls that, "In all his life, Jem had never declined a dare." In this case, bravery is important to Jem because he doesn't want to be seen as scared by another child. He again demonstrates bravery when he goes to retrieve his pants from the Radley's yard. However, his reason for bravery in this case is to prevent Atticus from learning that it was the children who were responsible for going into the Radley's yard.
Jem observes a different kind of bravery in Atticus. For example, Atticus shoots the rabid dog with one shot. Clearly impressed with his father's ability to shoot, Jem learns that it is not necessary to brag. Jem also learns a new definition of bravery by observing how Atticus responds to insults from the community at his decision to defend a black man in court. Atticus shares with Jem that Mrs. Dubose was "the bravest person" he ever knew. This again challenges Jem's understanding of bravery. When Atticus faces the crowd at the jailhouse, Jem refuses to leave. He stands his ground and demonstrates bravery because he wants to protect his father. As Jem matures, his reasons for and understanding of bravery mature with him.

Bravery is important to Jem for a few different reasons. First of all, his role in the family as big brother is significant; he must look out for Scout and be a role model to her, especially as Atticus works long hours and their mother has died. Jem must put on a brave face for Scout, to model for her the behaviors he knows their father values. Jem also values bravery because he is a pragmatic sort, and bravery is essential in various situations in the book in which Jem finds himself. In order to avoid getting caught by Atticus when he leaves his pants behind at the Radley place, Jem must exhibit bravery to go back to retrieve them at night and on his own. Finally, the times in which Jem lives and grows up are challenging times, ones that reward bravery. Jem perhaps does not even realize how much he values bravery, as being brave about his life is simply the only way to be. Atticus expects no less from Jem than bravery, so Jem delivers.