Stephen Sackur talks to newsmakers and personalities from across the globe. The world economy is in a mess. The pain is being felt from Wall Street banks to Chinese toy factories. But is he prolonged downturn going to fundamentally change the global economic rules? Ken Rogoff was the Chief Economist at the International Monetary Fund and is a renowned student of economic history. With nationalised banks, protectionist politics and governments frantically pulling the economic lever, has globalised capitalism had its day?