Well, you won't necessarily see humanity moving "toward" psychopathy/sociopathy. In order for a particular mutation/difference in traits to become the "norm", there needs to be an advantage great enough to see species members with that trait surviving long enough to procreate where others without that trait tend to die and not produce offspring. What you're discussing tends to just "show up" in a low percentage of population and isn't overly advantageous beyond humans with other dispositions. Also, as a standing fact of evolution, all forms are necessarily "between forms", and changes are ongoing - humans are in a somewhat interesting niche within our ecosystems because there are almost no selective pressures acting on us in modern times. That is... nothing killing certain members off at a rate large enough to affect procreation of "select" members with like survival traits. So any changes in human populations in our modern times is going to probably happen even more slowly and haphazardly because... well, nearly everyone lives to procreate - even those with poor eyesight, or who are prone to heart conditions, or pass on predisposition to cancer.