Elon Musk is a genius — a whirling dervish of intense mental and real-world activity who, apparently, can't stop worrying about AI. And now he's got all of us worrying about artificial intelligence triggering World War III. Is Musk wrong? My gut says: Yes, very wrong. Computers are smart and more rational than humans, so I think a sentient AI would do everything in its power to prevent a war. To be fair.