It may have just been coincidence, or perhaps something more symbolic, but whatever it was, Joe Biden saw the lights go out on him as he mentioned US "leadership" during his last major speech as vice president, in Davos, Switzerland. "We are going to retain our position of leadership," Biden was telling the audience at the World Economic Forum in Davos, when the lights on stage began to dim. Rendered a dark silhouette, and seemingly unimpressed, the outgoing vice president carried on talking about the West's ideas and visions of the world. "If we don't fight for our values, no...