There is no single answer that is superior.
Collectively, I could have listed pros and cons. But it's not a simple matter of being more intelligent (for example). If this were true, then running over a cat would be worse than killing a dog. But it's not, despite the cat being more intelligent.
You don't have to believe in a soul for it to exist. And it need not be a religious thing.
Have you ever been to a place where a recent massive death toll took place?
Think Ground Zero, or OK City.
You can "feel" it.
As someone interested in science, I'm surprised that you let your religious disbelief prevent you from recognizing this, or at least to consider it.
Maybe "soul" is the wrong word. Because of it's religious implication and heaven/hell and all that.
But there is something beyond intelligence and our special thumbs that makes us different. Superiority alone does not make us more valuable. It is much more.
tailgater wrote: