I most certainly do not believe in a soul, but I do believe that our certain characteristics of our human nature, such as personality (the big five for example) and intelligence are derived from heredity. I count myself among people such as Arthur Jensen and Richard Lynn who are hereditarians
Any thoughts about this as I do think it weakens whatever free will have.
To not believe in a soul, you’d have to define what a soul is. Maybe you’re not a dualist, but I don’t necessarily see the two things as the same thing.
The fact that environment can and does change personality and intelligence means I don’t put tremendous stock in hereditary traits, though. Sure, I’m certain that people inherit traits genetically - I just think such things matter less and less, especially as science advances. What used to be a death sentence from birth no longer is, and never has to be for all time.