As the novel progresses, the children’s changing attitude toward Boo Radley is an important measurement of their development from innocence toward a grown-up moral perspective. At the beginning of the book, Boo is merely a source of childhood superstition. As he leaves Jem and Scout presents and mends Jem’s pants, he gradually becomes increasingly and intriguingly real to them. At the end of the novel, he becomes fully human to Scout, illustrating that she has developed into a sympathetic and understanding individual. Boo, an intelligent child ruined by a cruel father, is one of the book’s most important mockingbirds; he is also an important symbol of the good that exists within people. Despite the pain that Boo has suffered, the purity of his heart rules his interaction with the children. In saving Jem and Scout from Bob Ewell, Boo proves the ultimate symbol of good.
If I went to a doctor and said “Tell me how to diagnose a patient,” or I went to a judge and said “Tell me how to interpret the law,” or I went to an artist and said “Tell me how to be creative,” do you think they would be able give me a few sentences that completely answer my question and prepare me for professional work as a doctor, judge, or artist? If they had spent years as students learning their subject matter, and additional years teaching or writing a textbook on their specialty, they might be very good in their professions but I’d bet they’d all find it tough to answer such a question in any meaningful way.
There are at least two problems with this interpretation. First, Durkheim took most of his data from earlier researchers, notably Adolph Wagner and Henry Morselli ,  who were much more careful in generalizing from their own data. Second, later researchers found that the Protestant-Catholic differences in suicide seemed to be limited to German-speaking Europe and thus may always have been the spurious reflection of other factors.  Despite its limitations, Durkheim's work on suicide has influenced proponents of control theory , and is often mentioned [ by whom? ] as a classic sociological study.