What factors are involved in the term okie in Grapes of Wrath?

In "The Grapes of Wrath," the term "okie" is used to refer to migrants from Oklahoma who were displaced by the Dust Bowl and the Great Depression. The factors involved in the term's usage include issues of social class, discrimination, and the struggle for survival during a time of economic hardship and environmental devastation in the 1930s. The slang term was often used pejoratively to stereotype and demean these migrants.