Click this for more information about the concept of a soul 
This is the catholic version of the soul 
We do not need a soul for survival, life after death, or immortality. It is a fallacy of supernatural belief systems to think that we need a soul or even have one. Itoimmortality shows how immortality is possible with out having to have spirits, souls, or other supernatural ideas, yet still be based on science.
The concept of a soul is one of the ideas that is at the foundation of supernatural theories of immortality.