Steve Jobs had it. George Clooney has it. Charisma is intangible but powerful - the personality trait that's used to win friends and influence people. Olivia Fox Cabane wasn't born with it. She was a high-school outcast in a country where she didn't fit in, a socially awkward teenager baffled by the nuance of social interactions. But she was also an analytical thinker. After high school, she found ways to reverse engineer her own shortcomings.