From the beginning of the novel, Twain makes it clear that Huck is a boy who comes from the lowest levels of white society. His father is a drunk and a ruffian who disappears for months on end. Huck himself is dirty and frequently homeless. Although the Widow Douglas attempts to “reform” Huck, he resists her attempts and maintains his independent ways. The community has failed to protect him from his father, and though the Widow finally gives Huck some of the schooling and religious training that he had missed, he has not been indoctrinated with social values in the same way a middle-class boy like Tom Sawyer has been. Huck’s distance from mainstream society makes him skeptical of the world around him and the ideas it passes on to him.

Huck’s instinctual distrust and his experiences as he travels down the river force him to question the things society has taught him. According to the law, Jim is Miss Watson’s property, but according to Huck’s sense of logic and fairness, it seems “right” to help Jim. Huck’s natural intelligence and his willingness to think through a situation on its own merits lead him to some conclusions that are correct in their context but that would shock white society. For example, Huck discovers, when he and Jim meet a group of slave-hunters, that telling a lie is sometimes the right course of action.Because Huck is a child, the world seems new to him. Everything he encounters is an occasion for thought. Because of his background, however, he does more than just apply the rules that he has been taught—he creates his own rules. Yet Huck is not some kind of independent moral genius. He must still struggle with some of the preconceptions about blacks that society has ingrained in him, and at the end of the novel, he shows himself all too willing to follow Tom Sawyer’s lead. But even these failures are part of what makes Huck appealing and sympathetic. He is only a boy, after all, and therefore fallible. Imperfect as he is, Huck represents what anyone is capable of becoming: a thinking, feeling human being rather than a mere cog in the machine of society.

Jim, Huck’s companion as he travels down the river, is a man of remarkable intelligence and compassion. At first glance, Jim seems to be superstitious to the point of idiocy, but a careful reading of the time that Huck and Jim spend on Jackson’s Island reveals that Jim’s superstitions conceal a deep knowledge of the natural world and represent an alternate form of “truth” or intelligence. Moreover, Jim has one of the few healthy, functioning families in the novel. Although he has been separated from his wife and children, he misses them terribly, and it is only the thought of a permanent separation from them that motivates his criminal act of running away from Miss Watson. On the river, Jim becomes a surrogate father, as well as a friend, to Huck, taking care of him without being intrusive or smothering. He cooks for the boy and shelters him from some of the worst horrors that they encounter, including the sight of Pap’s corpse, and, for a time, the news of his father’s passing.

Some readers have criticized Jim as being too passive, but it is important to remember that he remains at the mercy of every other character in this novel, including even the poor, thirteen-year-old Huck, as the letter that Huck nearly sends to Miss Watson demonstrates. Like Huck, Jim is realistic about his situation and must find ways of accomplishing his goals without incurring the wrath of those who could turn him in. In this position, he is seldom able to act boldly or speak his mind. Nonetheless, despite these restrictions and constant fear, Jim consistently acts as a noble human being and a loyal friend. In fact, Jim could be described as the only real adult in the novel, and the only one who provides a positive, respectable example for Huck to follow.

Tom is the same age as Huck and his best friend. Whereas Huck’s birth and upbringing have left him in poverty and on the margins of society, Tom has been raised in relative comfort. As a result, his beliefs are an unfortunate combination of what he has learned from the adults around him and the fanciful notions he has gleaned from reading romance and adventure novels. Tom believes in sticking strictly to “rules,” most of which have more to do with style than with morality or anyone’s welfare. Tom is thus the perfect foil for Huck: his rigid adherence to rules and precepts contrasts with Huck’s tendency to question authority and think for himself.

Although Tom’s escapades are often funny, they also show just how disturbingly and unthinkingly cruel society can be. Tom knows all along that Miss Watson has died and that Jim is now a free man, yet he is willing to allow Jim to remain a captive while he entertains himself with fantastic escape plans. Tom’s plotting tortures not only Jim, but Aunt Sally and Uncle Silas as well. In the end, although he is just a boy like Huck and is appealing in his zest for adventure and his unconscious wittiness, Tom embodies what a young, well-to-do white man is raised to become in the society of his time: self-centered with dominion over all.