The Price of Bread
When the value of a loaf was a question of justice, not supply
For forty years I have taught the history of economic thought, and I begin, always, with bread.
Before there were markets in our modern sense, there were prices, and behind every price stood a moral question.
The medieval mind did not ask what a loaf would fetch, but what a loaf ought justly to cost.
Thomas Aquinas, writing in the thirteenth century, called this the " price," a phrase that still unsettles my students.
To them, a price is simply whatever a willing buyer and a willing seller happen to agree upon.
To the scholastics, however, charging more than a thing was was not shrewdness but a species of theft.
A baker who doubled his price during a was not clever; he was, quite plainly, a sinner.
The price was meant to reflect the labour, the materials, and the customary of the good.
It was anchored not in or desire, but in a shared sense of what was .
I ask my students to imagine a town where the church, not the market, set the value of grain.
Such a world sounds quaint, even oppressive, to ears trained by two centuries of .
Yet the moral beneath it has never entirely died, and it surfaces whenever prices seem cruel.
When fuel triples overnight after a storm, we still speak, instinctively, of "price ."
That very word betrays a lingering conviction that some prices are not merely high but wrong.
The scholastics would have recognised our outrage at once, for it was the ground on which they stood.
They believed the economy was embedded in the community, answerable to justice rather than over it.
Money-lending at interest, which they called , was condemned for much the same reason.
To profit from time itself, from the mere passage of days, struck them as a violation of order.
We may smile at their theology, but they were asking a question we have never truly answered.
Should the price of a necessary thing be governed by need, or by whatever the market will bear?
The modern economist replies that prices are signals, and that interfering with them causes more harm than good.
The medieval moralist replies that a signal indifferent to suffering is a poor guide for a decent society.
I do not tell my students which answer is correct, because I am not certain that either is.
What I tell them is that the argument is very old, and that it is still unfinished.
Every debate about rent controls or drug prices is a distant echo of a dispute over grain.
So we begin, as those thinkers did, with the humblest of questions: what should a loaf of bread cost?