I'm not so sure how you distinguish overcoming the fear of death with simply being used to the idea of it being the end. I mean, I know I am much less disturbed by that idea than the religious who do not hold to it, but I don't know that I could say that it does not bother me at all. Eternal life bothers me too. But I know that I want to be alive tomorrow, and I can only assume that I will keep wanting that to be true. There seems to be some emotional contradiction, in which I am disturbed by both death and immortality. I would rather remain less than a century old forever, if you know what I mean.
Eliezer Yudkowsky paints a utopian picture of an ever-increasing population of immortal humans spreading throughout the stars after defeating death. I'm not so sure that that would be desirable itself, or that we could psychologically handle lives that long (or writing that many Christmas cards). Especially when the Stellar Age of the universe starts to wind down.
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