Although most people do not believe that the quality of one person can be determined only by one's social status, it is difficult to make a relationship without considering one's social class. Originally, social class was given to each person based on one's power or skills. So, social status should be just a symbol and does not originally give people authority in a society. However, throughout human history, because social classes have passed down from parents to children, one's class has usually been based on one's family background. Also, difference of social class facilitates discrimination toward certain groups which have different race, culture and customs. Nowadays, the idea of equality of opportunity has spread in the world and the irrational gap between upper class and lower class is becoming smaller and smaller, but class structure still remains in a lot of societies and it influences each person. In the novel The Kite Runner, by describing how Pashtuns characters behaved and how they considered Hazara characters, Khaled Hosseini shows that class structure has a big impact on relationships, and that difference of class makes it very difficult to create friendships and maintain family ties due to a sense of superiority, public image and prejudice even if class structure disappears.
Amir did not try to make his relationship with Hassan fair in order that he could keep feeling superior to Hassan. In childhood, they were raised by the same breast of a Hazara nurse, and played together in their garden. Because of it, there was brotherhood between Amir and Hassan and they both had faith in each other. However, their friendship was very ambiguous because of their difference of social class. Amir grew up as a son of a wealthy Pashtun businessman while Hassan was raised by a Hazara servant. In fact, both of them tolerated the relationship in which Amir always ordered Hassan to do something and he never rejected it.