The Dark Triad offers measurement and predictive validity of egotistic and anti-social dispositions, including the factors Narcissism, Psychopathy, and Machiavellianism. Based on the well established link between personality traits and values, this study proposes that the Dark Triad can be used to understand individuals’ propensity towards including or excluding other people in their social relationships. A group of 80 human resource management students whose future comptence among other things will be to cooperate with others were measured on the Dark Triad, Schwartz’ ten Value Orientations, and two versions of the Big Five personality traits (FIPI, BFI44). The results showed consistent negative correlations between the Dark Triad and the value dimensions of concern for generalized others, as well as positive correlations between the Dark Triad and the value dimensions of concern for self. The study also concluded that the Dark Triad works as a moderator of the relationship between personality traits (Big Five) and values (Schwartz’), and substantially adds additional explained variance especially on values of exclusion. The etiology of social in-group and out-group processes in everyday life is suggested to be individuals’ dispositions for dark values, a path towards deviant and negative behaviors.