A few months before the financial crisis hit, Krugman was already confessing to a “guilty conscience”. In the 1990s, he had been very influential in arguing that global trade with poor countries had only a small effect on workers’ wages in rich countries. By 2008, he was having doubts: the data seemed to suggest that the effect was much larger than he had suspected.

In the years that followed, the crash, the crisis of the eurozone and the worldwide drop in the price of oil and other commodities combined to put a huge dent in global trade. Since 2012, the IMF reported in its World Economic Outlook for October 2016, trade was growing at 3% a year – less than half the average of the previous three decades. That month, Martin Wolf argued in a column that globalisation had “lost dynamism”, due to a slackening of the world economy, the “exhaustion” of new markets to exploit and a rise in protectionist policies around the world. In an interview earlier this year, Wolf suggested to me that, though he remained convinced globalisation had not been the decisive factor in rising inequality, he had nonetheless not fully foreseen when he was writing Why Globalization Works how “radical the implications” of worsening inequality “might be for the US, and therefore the world”. Among these implications appears to be a rising distrust of the establishment that is blamed for the inequality. “We have a very big political problem in many of our countries,” he said. “The elites – the policymaking business and financial elites – are increasingly disliked. You need to make policy which brings people to think again that their societies are run in a decent and civilised way.”