I am troubled by a series of questions: how can we explain from a sociological and pcychological perspective why people are willing to die for their country? How are we to make sense of this patriotic martyrdom? I want to understand the connections between nationalism and self-sacrifice, more exactly how was it possible that so many people sacrificed their lives in War World I, for instance? How did societies succeed in convincing their citizens to embrace death in the name of their country? Can you recomend me any books approching these issues?