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 value? To what reward does a poem like the “Iliad” entitle its author?

The first business of political economy, after fixing its definitions, was the solution of this problem; now, not only has it not been solved, but it has been declared insoluble. According to the economists, the relative or exchangeable value of things cannot be absolutely determined; it necessarily varies.

“The value of a thing,” says Say, “is a positive quantity, but only for a given moment. It is its nature to perpetually vary, to change from one point to another. Nothing can fix it absolutely, because it is based on needs and means of production which vary with every moment. These variations complicate economical phenomena, and often render them very difficult of observation and solution. I know no remedy for this; it is not in our power to change the nature of things.”

Elsewhere Say says, and repeats, that value being based on utility, and utility depending entirely on our needs, whims, customs, &c., value is as variable as opinion. Now, political economy being the science of values, of their production, distribution, exchange, and consumption,—if exchangeable value cannot be absolutely determined, how is political economy possible? How can it be a science? How can two economists look each other in the face without laughing? How dare they insult metaphysicians and psychologists? What! that fool of a Descartes imagined that philosophy needed an immovable base—an aliquid inconcussum—on which the edifice of science might be built, and he was simple enough to search for it! And the Hermes of economy, Trismegistus Say, devoting half a volume to the amplification of that solemn text, political economy is a science, has the courage to affirm immediately afterwards that this science cannot determine its object,—which is equivalent to saying that it is without a principle or foundation! He does not know, then,