FAREED ZAKARIA
NEW YORK: The G-20 summit in Argentina is taking place at a moment when the United States still stands at the center of the world. The US economy is booming, the dollar is almighty, American technology companies continue to dominate the new digital economy, and the US military remains the unrivaled master of land, sky and sea. But there are forces, both short-term and long-term, that are working to erode this hegemony.