What are the motifs in Mudbound by Hillary Jordan?

Inequality is a recurring idea in the story. The novel is set in the 1940s in the years immediately after World War II. This decade in American history is still rife with racial inequality, especially in the southern states. Since this novel takes place in the Mississippi Delta, deep in the south, the reader expects that the novel's plot will deal with, in some degree, the darkness of this racial inequality.