Hmmm…
Well, some people, when they cannot walk anymore, they use a wheel chair. It is the nature of humanity to suppliment themselves when they can.
If we didn’t have the constraints of the afterlife, and if people didn’t NEED the concept of an afterlife, I think it would be much like a man who does not need a wheel-chair anymore, because he could walk.
Life is not easy for humans. The idea of an after-life is somewhat relieving. And I would guess that more emotionally-stable and strong-willed sorts of persons would not have as many “spiritual needs”, etc. So in this sense, we may be asking for a strong, confident, couragious and stable society, if we ask that they cast aside all of their metaphysical wheel-chairs.
But… I feel like my post, all up antil now, was way too secular-western.
near-death.com/
nderf.org/
nderf.org/vonlommel_consciousness.htm
On the other hand… humanity is probably right about there being an afterlife… But they are probably wrong about the “soul” being “immortal”.
From what I’ve estimated, the morphogenic field is responsable for things such as phantom-lymbs and also the “unexplainable” parts of physical healing/regenoration. This rapidly-reforming low-density layer is the part of thyself which has highest odds of surviving after “death”, simply due to how much more stable it is compared to the material-body. I’ve called this the “astral body”, for lack of another word…
Various friends of mine, online, for example, have had feelings of phantom wings and phantom tails. Ofcourse we are curious about it, we want to understand it, so we test eachother out, etc. I project near them, and touch a certain area of their phantom lymbs. I don’t tell them where, I just ask them where they feel it [if they are sensative enough]. And then they tell me where, even though I never told them… That’s just one example, of the kinds of experiments that I’ve done with various “unusual” friends of mine. Some of the really spiritually sensative ones, can feel the more wild and deep sensations, from the more-mobile body-layer. 
I usedto have many doubts, in the beginning, but after much self-testing, I certainly believe that there are subtle, additional dimensional layers stacked attop of [and undernieth] common-atomic/electronic-matter.
If anyone would like to read through the various areas, of those three links that I’ve shown, it could be a good place to learn. But I believe that at these philosophy-forums, even the “empiricists” prefer a somewhat rationalist-opinion-based analog of argument.