What is the purpose of a sociopath?

[Patrick]

In my opinion, the hallmark of STS is not the focus on the self or even the perceived separation from self and other-selves.

The hallmark is the unexpected result of this perceived separation... leading to doing things at the expanse of others.

If instead STS was content to just ignore all that is not the self as being unimportant to them, that would lead to a very different game.  But it seems that working exclusively on the self and ignoring all others is still walking the positive path.