Never Say Die:

Why Can’t We Imagine Death? “The common view of death as a great mystery usually is brushed aside as an emotionally fueled desire to believe that death isn’t the end of the road. And indeed, a prominent school of research in social psychology called terror management theory contends that afterlife beliefs, as well as less obvious beliefs, behaviors and attitudes, exist to assuage what would otherwise be crippling anxiety about the ego’s inexistence.

According to proponents, you possess a secret arsenal of psychological defenses designed to keep your death anxiety at bay (and to keep you from ending up in the fetal position listening to Nick Drake on your iPod). My writing this article, for example, would be interpreted as an exercise in “symbolic immortality”; terror management theorists would likely tell you that I wrote it for posterity, to enable a concrete set of my ephemeral ideas to outlive me, the biological organism. (I would tell you that I’d be happy enough if a year from now it still had a faint pulse.)

Yet a small number of researchers, including me, are increasingly arguing that the evolution of self-consciousness has posed a different kind of problem altogether. This position holds that our ancestors suffered the unshakable illusion that their minds were immortal, and it’s this hiccup of gross irrationality that we have unmistakably inherited from them. Individual human beings, by virtue of their evolved cognitive architecture, had trouble conceptualizing their own psychological inexistence from the start.” (Scientific American Mind)