Jem ages from 10 to 13 over the course of To Kill a Mockingbird, a period of great change in any child’s life. Jem is no exception to this rule. Interestingly, the changes he undergoes are seen from the point-of-view of a younger sister, which gives a unique perspective on his growth.
Jem represents the idea of bravery in the novel, and the way that his definition changes over the course of the story is important. The shift that occurs probably has as much to do with age as experience, although the experiences provide a better framework for the reader. When the story begins, Jem’s idea of bravery is simply touching the side of the Radley house and then only because “In all his life, Jem had never declined a dare. But as the story progresses, Jem learns about bravery from Atticus facing a mad dog, from Mrs. Dubose’s fight with addiction, and from Scout’s confrontation with the mob at the jail, among others. And along the way, he grows from a boy who drags his sister along as a co conspirator to a young gentleman who protects his Scout and tries to help her understand the implications of the events around her.