Not really, there are many atheists that believe in a soul, and as far as I am correct there are also religions that don't need a soul either..
That surprised me, at first...........
My (initial) concept of 'soul' is quite different, and different from 'Operating System' too.
If the brain is a computer, and a life-time is a USB plug-in, then the soul is the God-operator who, from the computer's perspective, is imagined to plug the USB device into the brain's port over and over again with each waking instant of existence.
That makes sense; not the first time I read it.........., but it is growing on me.
Because the fundamental issue is that of appeal to supernatural agency. To believe in souls while holding no belief in gods is equivalent to believing in the Fairy Kingdom while holding no belief in the Goddess Danu.
I must admit that was my initial reaction (though I would have couched the words so as to be less abrasive)...........