
When playing the game Monopoly this card can relieve stress and allow some confidence in the conception of how the game will go, as can obtaining a second queen in a game of chess. Robert Sapolsky and others have noted that many animals have a clear conception of their own possible death, but apparently no lasting stress about it. Zebras may experience extreme fright when running from a pride of lions, but once a kill is made the others that are safe will graze or even play somewhat nearby, realizing their own person threat is over, with no conception it could be any of them meeting such a fate in the future.
Our species evolved with a large neocortex for solving future problems as a survival skill, and with that is conceptualizing personal fate, and also inventive idea making. The capacity to clearly imagine our own future death, given human culture invents notions which function to relieve stress and promote confidence, makes it seem automatic that the invention of ideas of a soul that survives death would arise and be codified strongly in various cultures.
There is never much thought about what would be "preserved" in notions of a soul that continues living. Throughout life, people change in personality in very large ways, and so which of those is to be represented in some sort of afterlife? Consider the case of Phineas Gage, the unfortunate 19th century man who suffered a large brain injury, and transformed from a kind and peaceful person to a hostile and nasty person. Which "soul" gets an afterlife? Saying both is just a denial of the reality they are not compatible, and both were fully real human personalities. Consider cases of people with brain dysfunction who only have short term and fleeting memory, a few minutes at a time (depicted as an example in the film
Memento). Again, you can't escape the question and say all of them.
Beyond the demonstrative cases above, we all exist differently in different stretches of time and events, and are different people as time goes by; picking one of those at death as getting a permanent or supposedly infinite life does not make sense, upon deeper examination. Nor does combining them, nor does picking a "best version" of some past point.
All of this metaphysical musing reminds me of something else, though. The only idea of an after-life I have ever come across that had any appeal was in the remarkably calm and charming film
After Life, from director Hirokazu Kore-eda. The idea there was that you could re-live one singular wonderful memory from your life, over and over, forever. It's absurd, but a very charming idea. Outside of this, the notion of an infinitely long life is ultimately repellant, and would either be infinite repeating or infinite nonsense, as this is profoundly bound to the Hilbert's Hotel paradoxes on infinity. Life has meaning within boundaries of time and of events, and could not have it otherwise.