I’ll focus on the social standings portion of the question. What stands out to me about social standings in the novel is the racism. The Pashtuns, the upper class, persecute and domineer the Hazaras. We see the Hazaras working as servants and subject to racist jokes, and their abuse in many cases is tolerated by most of society in the book.
Consider our past in the United States. Certainly, the United States has a past of Caucasians treating African- Americans in this manner. Ask yourself if you still see these sorts of conflicts between races in our country. That’s your opinion.