His inability to connect with people is clear and undeniable. It could be the Mormon in him, but I have though for awhile now that he has sociopathic tendencies.
The story about him leading a gang of boys at Cranbrook prep school in assaulting another boy with long hair and cutting it off, is very revealing. A ll the other boys involved in the assault against the gay student have expressed regret, often deep and profound, when interviewed as grown men. They are very sorry that they were involved. One even ran into the victim many years later, and apologized to him.
By contrast, Romney chuckled as he recalled the story. Apologized -if- he had hurt anybody. No empathy, no remorse.
Sociopath?
Romney also claims that he doesn't remember. And that would be scary. The people who don't remember things like that are typically people to whom it made very little difference, people who lack empathy.