How is the Jim given a voice and how is he stereotyped?

The depiction of black slaves changes dramatically in the course of the novel. At first, slaves are merely background characters, carrying out chores while white characters monopolize the plot. However, this changes with the introduction of Jim, and continues to develop even when Jim leaves the plot for brief periods. Thus, the King's forced break-up of the Wilks's slave family powerfully impacts the reader, whereas before getting to know Jim, it might not have been perceived as so significant. In addition to being a story about Huck's growth and maturation, and resulting freedom from his Pap, The Adventures of Huckleberry Finn is also a story about Jim's journey towards freedom. By ending the novel with Jim becoming a free man, with money to his name, Twain provides a clear social commentary about the immorality of slavery.