New York City - The reappearance of a belligerent Russia on the world stage, buoyed by high oil prices and newfound wealth, would appear to signal a new era in global politics. For anyone still clinging to the idea of the unipolar moment, the spectacle of Nicholas Sarkozy brokering a deal between Russia and Georgia, shows that the moment of a single superpower is probably over, and something like a return to the era of...