Create compelling, convincing villains with the General Dark Factor of Personality (D-Factor): "the basic tendency to maximize one's own utility at the expense of others, accompanied by beliefs that serve as justifications for one's malevolent behaviors." blogs.scientificamerican.com/beautiful-mind…
The D-Factor's 9 traits comprise:
—Egoism*
—Machiavellianism*
—Moral Disengagement*
—Narcissism
—Psychological Entitlement
—Psychopathy*
—Sadism*
—Self-Interest
—Spitefulness*