Explores an emerging new science with startling implications for our interpersonal world. Its most fundamental discovery: we are designed for sociability, constantly engaged in a 'neural ballet' that connects us brain-to-brain with those around us. Goleman explains the surprising accuracy of first impressions, the basis of charisma and emotional power, the complexity of sexual attraction, and how we detect lies. He also reveals the 'dark side' of social intelligence, from narcissism to Machiavellianism and psychopathy. Is there a way to raise our children to be happy? What is the basis of a nourishing marriage? How can business leaders and teachers inspire the best in those they lead and teach? How can groups divided by prejudice and hatred come to live together in peace? The answers to these questions may not be as elusive as we once thought. And Goleman delivers his most heartening news with powerful conviction: we humans have a built-in bias toward empathy, cooperation and altruism - provided we develop the social intelligence to nurture these capacities in ourselves and others.