One of the main themes in Harper Lee's To Kill a Mockingbird is childhood innocence and how quickly it is lost. Since Jem is young, his personality changes greatly, especially his childlike innocence. His sister, Scout, loses some of her childhood innocence, but since she is just starting to lose her innocence, her personality is not affected as much as Jem. Over the course of the novel Jem transforms from a boy who wants to know more about the mysterious Radleys, to an annoying older brother who doesn't want to be seen with his little sister, to a wise young man who understands the injustice of life. At the beginning of the book, Jem is a young, innocent boy looking for fun and mystery. He is very proud and, as a result, a little reckless. “In his entire life, Jem has never turned down a challenge,” (16) and that is why he agrees to touch the Radley house. Jem often doesn't care much about rules or consequences until it's too late. This also happens when he tries to catch a glimpse of Boo Radley and, due to lack of thinking, almost gets hit and loses his pants. Another thing Jem...