Jim Casy exists as the philosopher, the motivator and the voice of reason in The Grapes of Wrath by John Steinbeck. The ex-preacher is used to express some of the book's major themes, explicitly articulated in his actions. Jim Casy, by fulfilling his predominant role as the novel's guiding moral voice, establishes not only a sense of god, but also one of morality and justice. Jim Casy is an ex-preacher who is unsure of how …showed first 75 words of 1172 total…

…showed last 75 words of 1172 total…required unity of mankind. Jim Casy, The Grapes of Wrath's philosopher, its motivator and its voice of reason and morality, gives the other characters, particularly Tom Joad, a purpose. By joining the cause to help the people and inspiring others, like Tom Joad, to join the same fight, Casy ensures his immortality. By the end of the novel, Casy has merged his spirit with the whole of humanity, living on in the fight for mankind.