Everyone, it seems, is fascinated by psychopaths. They make up an estimated 1% to 2% of the population, so there may be more than six million of them in the U.S. alone. Most of them, of course, are not sadistic murderers like Hannibal Lecter, but they all have one thing in common: an abnormal lack of empathy. But what is the cause of that lack, and can it teach us anything about ordinary moral behavior?
In “The Fear Factor,” Abigail Marsh, a psychologist and neuroscientist, describes her research into that question with great verve.
Read the whole story: The Wall Street Journal