“I have for many years thought the problem of the incommensurability, and still more the incompatibility, of some values to be central to all ethical, social, political and aesthetic issues.” Isaiah Berlin.
One of the more interesting features of the Brexit debate is the way it raises a question of how human beings argue about incommensurable values. By this, I mean values that are not comparable on some common scale – values that are so intrinsically different that they do not lend themselves to any sort of direct comparison or ranking.
You might say, for instance, that those who think the Brexit question fundamentally revolves around issues of sovereignty, and those who think it is all about prosperity, are appealing to values are so different in kind that they can only ever talk past one another. Could it be that much of the anger generated in the exchange between these positions comes from a frustration at managing debate between incommensurable values?
Those, like the great Oxford philosopher Isaiah Berlin, who believe that there are incommensurable values in human life are known as ethical pluralists. Those who believe that human values can ultimately be reduced to one super-value – often something like utility, or happiness – are known as ethical monists.
The dominance of economics over the way we talk publically about the things we esteem in human life, and the way this has played into so-called ‘evidence based policy’, has meant that public discourse is often, de facto, a form of ethical monism. The attraction of monism to the tidy-minded is that it promises to make comparisons between apparently different things easier, assigning each some common and comparable value.
In other words, the monist argues that apparently different values, once properly understood – that is, translated in term of the super-value – can be plotted on the same scale, and thus easily compared, assigning each some sort of numerical value. Value A has X units of super-value Alpha, value B has Y units of super-value Alpha. Therefore, in deciding between the two, one has only to compare X and Y to see which is the greater. Moral decision-making is that straightforward.
But, unfortunately, the monist achieves this simplicity at the expense of a proper estimation of why certain things are valuable. The debate over the importance of the arts in education, for instance, is often hampered by the dominance of monist assumptions, with the arts being required to justify themselves in terms of their utility, something that STEM subjects, for instance, find it much easier to do.
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