We know that people choose evil. But why? There must be reasons.
Evil is essentially acting with indifference to the well being of those who do not act indifferently to you. We call this "selfishness".
I am familiar with several kinds of selfishness, each associated with a specific social trait:
Normative selfishness is the pursuit of naked self-interest within the confines of the law. In AD&D terms it equates with true neutrality. Consider CPig, or Newt Gingerich, as an example.
Teleological concordant selfishness is the willingness to act beyond the boundaries of cultural decency in pursuit of selfish motives. It is the willingness to break the law and assist others in the breaking to achieve personal ends. The AD&D equivalent is neutral evil. Its exemplar is Vladimir Putin.
Discordant selfishness is sociopathy.
Telelogical discordant selfishness is borderline personality disorder.
Today I want to talk about concordant selfishness, because I've had a lot of interaction with these people and I've noticed some common things. The concordantly selfish are basically the neutral goods ("socially concordant" in terms of supersocionics) of the evil spectrum, people who have deep capacity for pity and compassion above and beyond cultural expectations. The concordantly selfish differ from social concordants, however, in that they fear letting people know they care. The reason for this is that enter relationships with others with abandon, lowering their defenses prematurely and as such, becoming deeply disappointed unawares. A key reason for this is in that they lower their defenses to people, as opposed to networks. Thus they will act selfishly against a friend of a friend, and lose the trust of their friend. Moreover, their friend is like to attack them openly in defense of their other more trusted and more esteemed friend. This is counted as a painful betrayal, and their walls go back up in response. With the walls up, the selfish concordant person feels in their isolation that they have no reason not to exalt their selfish side, and to push within the law as far as they can to achieve whatever they want. They may even push to repeal laws that stand in their way, and seek after political power and influence. For an exemplar, look no further than John Boehner, although I would also put Ashton in this category.