Paul J. Smith : I spent a decade trying understand why people are usually moral . His new book reports how brain chemical oxytocin motivates moral behaviors . He also tests Aristotle 's theory that a virtue makes one happy . I 'm an introvert who learned to revel in community . The logical step was to see if I could understand the happiness molecule , he says .
Paul J. Smith : I spent a decade trying understand why people are usually moral . His new book reports how brain chemical oxytocin motivates moral behaviors . He also tests Aristotle 's theory that a virtue makes one happy . The logical step was to see if I could understand the happiness molecule , he says .