Americans require happy endings. In our movies, in our books, in our lives. We don't allow for suffering or unhappiness. We don't tolerate unhappy stories from others. We don't tolerate "negative" moods. Everyone is supposed to be happy, all the time and everything is supposed to turn out right, all the time.
Well it seems that our fear of death is now being called "terror management" by social psychologists. That sounds more like a department of Homeland Security to me. Previously referred to as "existentialist angst" or "death anxiety" by existentialists, this is our fear of non-existence after death. So, what is the cause of "death anxiety"?