Some of you will find you can go along with this, but some of you will just click your browser button and head out of here. From earliest times, groups of humans living all over the inhabited globe, in isolation one from another, struggled to cope with what happened at death. Somehow, they became aware that there was a spirit world into which they would travel at physical death. The precise nature of this belief has varied from tribe to tribe, from place to place and from time to time. The idea that life continues after death is a strange one.
Spiritualism has an answer.
It could be said that he had a soul. We can't explain it, any more than we can explain how and why the universe started. It could be that spirits exist before they enter human life. But these are views and conjectures. The complete evidence we have stops with proof of surviving physical death.