Janko Mededovic holds a PhD in psychology and works as a senior research associate in Institute of criminological and sociological research; furthermore, he leads the courses Psychology of individual differences and Evolution of human behavior at the Faculty of media and communications, Belgrade, Serbia. His research topics cover two broad themes: 1) the dispositions toward immoral and antisocial behavior (psychopathy, sadism, “Dark tetrad”, militant extremism; 2) human behavioral ecology (life history theory, the relations between behavioral traits and evolutionary fitness, evolutionary personality ecology). He published more than 80 scientific manuscripts in peer-reviewed journals including Human Nature, Journal of Biosocial Science, Journal of Comparative Psychology, Evolutionary Psychology, Social Psychological and Personality Science, Personality and Individual Differences, and others. He is the author of scientific monograph Nomological network of psychopathy.