Most neuroscientists believe we have a dedicated system for social reasoning, quite different to the one that is used for non-social thinking. What’s more, when one system is on, the other turns off. Lieberman explains how the social system fulfils three core tasks. First, it must make connections with others, which involves feeling social pains and pleasures, such as those of rejection or belonging. Second, it must develop mind-reading skills, in order to know what others are thinking, so as to predict their behaviour and act appropriately. Finally, it must use these abilities to harmonise with others, so as to thrive safely in the social world.