For instance, what is cause and effect? Many people become night owls when they get disconnected from normal society (studying/working alone for more than a few days). And the Dark Triad people are disconnected from other people emotionally, by definition.
(Another question -- is it only Machiavellian people that think sick people should have a right to their own lives and be allowed assisted suicide?! I call that bravely showing mercy, despite having to face horrible facts about the situation? Or is that what Machiavellian people do?)
Edit: I am aware of the definition of Machiavellian, 6d0debc071. The example I took up in parentheses was from the article.