"If we do not have a soul, we can not have free will, since we would be entirely subject to the laws of physics. Since our brains are just a bunch of molecules bumping around, our thoughts actions etc. would be entirely subject to what they (the molecules) do. A soul (or spirit) is nescesarry effect small changes in them to modify our actions.
A rock is also a bunch of molecules. It has no soul, therefore it has no conciusness, and has no will.
btw, what is your definition of life, and do you believe in free will?"
No i don't believe in free-will, again it would break every law of physics known to man and has been shown experimentally not to exist.
Conciousness and the soul are to very separate subjects, a soul cannot be, conciousness most certainly is.
My definition of life is a self-replicating system capable of mutation.