With Labour potentially on the brink of a historic general election victory, the hard-fought question of what the party stands for has taken on an immediate, practical relevance.
At the outset of this twisty political history, Jon Cruddas, the outgoing MP for Dagenham and Rainham, admits he is not a neutral observer of Labour’s battle of ideas. His central claim is that Labour’s purpose cannot be reduced to a single statement or slogan – but embraces three distinct ideas of justice, whose hold on the party has ebbed and flowed over time.