Hmm, interesting take on it. About how long ago do you suppose this happened? Are the soulless humans where Cain and Abel got their wives? Do the soulless account for the sons of man, the giants in those days, and the inhabitants of Nod as well?
Those are all interesting speculations.
As to when God breathed a soul into Adam, I would think it would be just before the time that anatomically modern humans (who existed for hundreds of thousands of years previously) suddenly developed advanced culture, religion, art, language, abstract thought, etc., which I believe was about 50,000 years ago, based on the sudden appearance at that time of archeological artifacts and accoutrements associated with same.
