"presidents in Kabul had been inaugurated and murdered"

When Hosseini writes about Mariam's thoughts, he includes the information about Kabul's presidents, and how they had been constantly murdered and then inaugurated once again, but Mariam had "hardly noticed, hardly cared." These events are not something that most people would find normal, in fact, if one of our presidents were to be murdered, it would be talked about for years. However, in the Afghan society that Mariam lives in, things like these are hardly rare, they are common occurrences. One could look at the sentence as not just political power changing, but the entirety of Afghanistan changing with it, constantly. This is something that the people have learned to live with, and it is part of their every day life. Change does not just occur in political power, but in the laws, religion, and standards that govern the lives of these people, and they are powerless to control it. Their lives are decided by the constant wars in Afghanistan, and the presidential power is just one of the outcomes of these wars. Hosseini includes this information to remind us of that change, and how it affects the people, which is a major theme in the book.