Inside the brain of a psychopath

I mean literally

What made Bernie Madoff tick? The guy amiably chatted with life-long friends over dinner as he drained their life savings. Or Jeff Dahmer, who befriended his victims, lured them to his apartment and then had them for dinner. It’s always been disturbing yet fascinating: The Bard got it right when he wrote that one may smile and smile and be a villain.

One…