'Richly nuanced, the most stimulating book I have read on Labour in ages'. - Martin Kettle, The Guardian December 2019 was a catastrophe for Labour. After nearly ten years in opposition, the party has suffered its fourth straight defeat and is approaching fifteen years since it last won an election. As the soul searching begins, Labour's broad church will have to ask- at what level do we disagree? Since Jeremy Corbyn became leader this has been a central question for the two sides of the left. There is constant discussion of 'splits', 'coups' and 'purges'. Anger and impotence are felt on both sides. Everyone seems to hate each other, but no one can agree on why. Writing from a centre-left perspective, Chris Clarke points to where the guts of the dispute lie. He argues that disagreements come down to narrative, not core values. Belief or otherwise in the three central myths which drive left populism - a 'dark knight' conflict between good and evil, control by elite puppet masters and nostalgia for a golden age - represents the true dividing line between pro- and anti-Corbyn factions. Combative but constructive, The Dark Knight and the Puppet Master makes the case for pluralism and questions the premise of Corbynism. Rather than a call for 'faux harmony', it's an attempt to break the deadlock - providing a route-map for the centre left, an explanation to the far left, and the foundations for a genuine debate between the two. Previously published in an earlier edition by Rowman & Littlefield and Policy Network under the title Warring Fictions.