Mention of the name Adam Smith calls to mind the “invisible hand” of the market, free trade, even capitalism itself. And money makes this capitalist world go round. So the Bank of England’s decision to feature Smith’s face on its twenty-pound notes, starting this spring, certainly seems appropriate.

  The Bank’s Governor, Mervyn King, says that Smith reminds us of how “openness to trade with others” allows us to “seize opportunities to specialize” that result in higher “productivity, incomes and standards of living for citizens of all countries.” To drive this point home, the new banknotes will have an engraving of a pin factory, which Smith used as an example of how the division of labour increases productivity, with the caption: “and the great increase in the quantity of work that results.” King hopes the new banknotes will encourage visitors to Britain “press their own politicians to support the opening up of trade, which has been at the heart of the British Government’s efforts to reform the world economy.”

The image of Smith presented on the banknotes, while not incorrect, is certainly one-dimensional. It ignores those aspects of his investigation of capitalism that run directly counter to some of the cherished beliefs of his followers.

That is not to suggest, however, that Smith was an anti-capitalist. Some like Noam Chomsky have flipped through the pages of The Wealth of Nations to uncover ideas critical of capitalism, but this effort seems misguided and unhistorical. Smith undeniably had faith in capitalism, but this view arose naturally from living in an ascendant capitalist system that had yet to fully reveal its contradictions. Compare this to the contemporary cheerleaders for capitalism who can only maintain their belief by denying reality. In late 18^th century Europe, there was no socialist spectre haunting the sleep of burghers like Smith. If anyone had insomnia it was aristocrats worrying about the rising bourgeoisie. With the peace of mind that this situation afforded him, Smith pursued the sort of disinterested study of capitalism that could only be carried out a century later by critics of capitalism, such as Marx.

A labour theory of value

Smith’s great interest in the “specialization” of production, which the new banknotes emphasize, naturally led him to ponder what regulates the commodity exchange that mediates this division of labour. In other words, he wondered what determines the “exchangeable value” of commodities. In using this term, Smith already makes an important distinction from what he calls “value in use.” Smith notes that something with great utility, like water, has no exchange value at all, whereas a diamond is of little real use but has great exchange value. Smith thus sets aside the issue of use-value, to instead “investigate the principles which regulate the exchangeable value of commodities.” The answer he arrives at later came to be known as the “labour theory of value.” That is, he identifies the labour necessary to produce a commodity as the factor that regulates its exchange-value.

This view is presented in chapter six of The Wealth of Nations, where Smith says that “the proportion between the quantities of labour necessary for acquiring different objects seems to be the only circumstance which can afford any rule for exchanging them for one another” He offers the example of “a nation of hunters” where it usually costs twice the labour to kill a beaver” than “it does to kill a deer.” The result is that “one beaver should naturally exchange for or be worth two deer.” In other words, “produce of two days or two hours labour” would naturally “be worth double of what is usually the produce of one day’s or one hour’s labour.”

Smith goes on to point out that more difficult or complex labour would naturally be worth more than simple labour: “If the one species of labour should be more severe than the other, some allowance will naturally be made for this superior hardship; and the produce of one hour’s labour in the one way may frequently exchange for that of two hours labour in the other.”