Kudos for posting the article!
This brings up a couple of connections to evolution too for it is not the most caring or loving who survive. It is the most fit to the current environment, and currently egoism pays off. The question on my mind is, what is the role of laws on narsistic (sp?) behavior, do they actually suppress or increase it? Some people notice narsists from afar, and could intervene, but the laws tend to prevent that, and on top of that, the referred abusive "jerk" gets likely DEFENDED by his girlfriend in the court.
To open the discussion to another direction (generalization warning), I have to mention that for some time, I have been thinking that the nature has intended the higher functioning autists to be the natural counterpart for narsists, as their nature seems to be almost the opposite. Narsists are well-aware of the social hierarchy, while autists simply do not care about it. Autists seem to have a very intrisic moral code, while narsists then do not care about it.
However, I'm still waiting for a research paper on the role of women controlling the sex life in a partnership, which would lead to another interesting topic; does prostitution have an effect on divorce rates, and if so, what is that effect?