In the Grapes of Wrath, the motivations of Preacher Casey, Tom Joad, Pa, and Ma change throughout the movie and represent the sentiments of Americans during the 1930s. During this time period the economy was on the verge of collapse for a series of years and after the stock market crash in 1929, the nation officially entered an economic depression leaving many workers jobless and hundreds of families penniless. Previously, many inexperienced farmers had travelled west looking to make a profit off of their own labor. The great migration movement was partially caused by the idealization of the west fueled by Jackson Turner’s Frontier Thesis and the devastating conditions and economic status of many eastern workers. However, most of the families that migrated west were inexperienced so farm land was not treated correctly.…