The decline of the centre-left over the past years is one of the most alarming trends in Western politics. During the latter part of the 20th century such parties either ran the government or led the loyal Opposition in virtually every Western democracy. Germany’s Social Democratic Party (SPD), once the most powerful party of the left in continental Europe, currently polls in high 20s or 30s. The French Socialist Party was eviscerated in the 2017 elections, as was the Dutch Labour Party. Even the vaunted Scandinavian social democratic parties are struggling, reduced to vote shares in the 30 per cent range. The British Labour Party and the US Democrats have been protected from challengers by their country’s first-past-the-post electoral systems, but the former has recently taken a sharp turn to the hard-left under Jeremy Corbyn, while the latter, although still competitive at the national level, is a minority party at the state and local levels, where a hard-right Republican Party dominates the scene....
