In 2016 Labour, led by the most left-wing leader that the party had ever seen, burst into new life. The Westminster beltway of political insiders, pollsters, commentators and newspaper proprietors were completely taken by surprise and left with egg all over their faces. Few took the trouble to ask how or why Labour, almost alone amongst parties on the left in Europe, had re-grouped, revived and successfully turned its back, so decisively on Tony Blair and Bill Clinton’s ‘third way’.