The Jim Crow laws made it so that African Amerians were seperated from whites. According to the National Park Service's list of Jim Crow laws, "It shall be unlawful to conduct a restaurant or other place for the serving of food in the city, at which white and colored people are served in the same room." Africans that did not follow these laws could be lyched if it came down to it.
The Great Depression
Roll of Thunder, Hear My Cry is a book that was written during the time of the the Great Depression. The New Gorgia Encyclopedia states, "The beginning of the Great Depression can be traced to the stock market crash of Tuesday, October 29, 1929." The Great Depression itself lasted during the 1920s and 1930s and caused about a quarter of the population to lose their job. This shows in Roll of Thunder, Hear My Cry when the school can't afford anything for themselves. The drought, beginning in 1925, caused some to quit farming.