I have a working hypothesis that civilization increases the alleles in the human population that are factors in the development of sociopathy and psychopathy in individuals, and tribal societies attenuate such alleles.

If I'm right then it's the abandonment of tribalism that is at the root of our problems, the exact opposite of the assertion of the OP.

But interestingly, not pre-history (pre-civilization).

One of the biggest problems in the world is the bias civilization dwellers have against "tribal instincts". Maybe if we followed our tribal instincts a little closer and created tightly knit small social structures we wouldn't have all the problems that we have, which in my mind are the results of the unnatural character of civilization. Our tribal instincts worked well to preserve us and our mental health for hundreds of thousands of years, but when they do not comport to the demands of civilization, it's our tribal instincts that are the root of our problem?