The Tata Steel sale has revived the battle between protectionists and free traders, a debate that became particularly acute in the run-up to the creation of the World Trade Organisation in 1995, which marked the success of “free traders” all around the world. In the protectionist camp, there is now a wide range of political parties from the extreme left to the extreme right: from Syriza to Ukip, from the Front National to Podemos. The common element for all these parties is that they dream of returning to a time when “we were in control”; when we could easily open...