There is a thread that’s been left dangling from our show at the end of last year on Ambrogio Lorenzetti’s fourteenth century “Allegory of Good and Bad Government”, painted on the walls of the Sala dei Nova in Siena’s Palazzo Pubblico.

The dominant figure of Justice sits on the left side of the central mural. She has her thumbs on two scales to hold them in balance, with angels on either side meeting out punishment and just recompense. Directly below her sits the figure of Concord (Concordia), a carpenter’s plane across her lap, as she weaves together the judgements into a red-and-white braided rope. This rope then passes from her hand to the hand of the first of 24 citizens who stand along the base of the mural.

The rope finally becomes the staff held by the figure of “the Good Commune” — or, perhaps, “the Common Good”. It is as though the Common Good is constituted by concord among citizens, from which citizens in turn hope to receive what is necessary for their shared life.

From Roman philosophers like Cicero down to the artists of the Italian Renaissance, there has been an understanding that concord — or what we now might call “social cohesion” — proceeds from the fair distribution of justice, and is grounded in the confidence of citizens that it is being distributed fairly. But what happens when concord begins to fray?

This month, the Royal Commission into Antisemitism and Social Cohesion will be handing down its interim report. It is fair to say that, since the horrific attack at Bondi Beach that precipitated the establishment of the commission, social cohesion is under severe strain, perhaps to breaking point for some communities.

The question for us now is: When the conditions of public trust in a society have weakened, could the deliberative capacity of a mini-public — such as a citizens’ assembly — help restore it?

Guest: Ron Levy is a Professor in the College of Law, Governance and Policy at the Australian National University.