Christan Jarrett writes: “a team of Hungarian researchers from the University of Pécs has scanned the brains of high scorers on Machiavellianism [selfish individuals consider other people as mere tools to be leveraged in the pursuit of their aims] while they played a simple game of trust. Reporting their results in the journal Brain and Cognition, the researchers said they found that Machiavellians’ brains went into overdrive when they encountered a partner who exhibited signs of being fair and cooperative. Why? Tamas Bereczkei and his team say it’s because the Machiavellians are immediately figuring out how to exploit the situation for their own gain.”