I’m not saying you were abusive. The original post makes it sound like failing to have a united parental front causes a child to become a sociopath. That isn’t the cause.

If he was damaged by abuse/neglect, my understanding is the most damage is done in the earliest phase of life - baby/toddlers most at risk. I think MI is genetic plus environment.

I don’t know that he is a sociopath, people use the term loosely. Has he been diagnosed?