‘Brighter prospects, optimistic markets, challenges ahead’. That was the title of the International Monetary Fund’s World Economic Outlook update in January this year. How quickly things change. Since that report was published, turbulence, volatility and crises have dominated the landscape. The trade war between the United States and China has escalated at an alarming rate. The World Trade Organisation appellate body looks set to be shut-down. Argentina is in crisis. Turkey is not far off. Markets have been rattled in Indonesia, Myanmar, Italy and Spain as financial conditions tighten. The fallout from Brexit is more uncertain than ever. Populist politicians continue their rise. China’s financial system remains problematic. The United State...