Huck Finn Rollin Down the River: The Uniting of Theme and Plot in Mark Twain's The Adventures of Huckleberry Finn In Mark Twain's novel, The Adventures of Huckleberry Finn, Twain develops the plot into Huck and Jim's adventures allowing him to weave in his criticism of society. The two main characters, Huck and Jim, both run from social injustice and both are distrustful of the civilization around them. Huck is considered an uneducated backward boy, constantly under pressure to conform to the "humanized" surroundings of society. Jim, a slave, is not even considered as a real person, but as property. As they run from civilization and are on the river, they ponder the social injustices f