Digby Tantam presents his ground-breaking theory of the interbrain the idea that human beings are endlessly connected by a continuous interplay of non-verbal communication of which we are unaware Considering social smiles & the way emotions can spread from one person to another he explores the research that shows how our brains are linked & draws out the implications of the interbrain for our understanding of empathy social communication psychology & group behaviour Exploring this often overlooked aspect of our human nature Tantam demonstrates how the interbrain has huge significance for psychology psychiatry & sociology & can transform our understanding of war morality terrorism psychopathy & much more