David Hume's unusual (Lockean) argument for free trade

Nothing is more usual, among states which have made some advances in commerce, than to look on the progress of their neighbours with a suspicious eye, to consider all trading states as their rivals, and to suppose that it is impossible for any of them to flourish, but at their expence. In opposition to this narrow and malignant opinion, I will venture to assert, that the encrease of riches and commerce in any one nation, instead of hurting, commonly promotes the riches and commerce of all its neighbours; and that a state can scarcely carry its trade and industry very far, where all the surrounding states are buried in ignorance, sloth, and barbarism.

It is obvious, that the domestic industry of a people cannot be hurt by the greatest prosperity of their neighbours; and as this branch of commerce is undoubtedly the most important in any extensive kingdom, we are so far removed from all reason of jealousy. But I go farther, and observe, that where an open communication is preserved among nations, it is impossible but the domestic industry of every one must receive an encrease from the improvements of the others. Compare the situation of Great Britain at present, with what it was two centuries ago. All the arts both of agriculture and manufactures were then extremely rude and imperfect. Every improvement, which we have since made, has arisen from our imitation of foreigners; and we ought so far to esteem it happy, that they had previously made advances in arts and ingenuity. But this intercourse is still upheld to our great advantage: Notwithstanding the advanced state of our manufactures, we daily adopt, in every art, the inventions and improvements of our neighbours.--David Hume "Of the Jealousy of Trade"

Of the Jealousy of Trade presents itself as a companion piece to "Of the Balance of Trade," and is easily overshadowed by it. That's a shame because Hume's particular argument is still timely, as I look at the news reporting on Brexit talks. Unlike the more familiar Smithian ('absolute advantage') and Ricardian ('comparative advantage') arguments,* Hume's here is focused on what we may call the epistemic effects (or positive externalities) of trade. I assume this is familiar in the literature, but I had not noticed it before.

For Hume trade exposes us to innovations of others and induces imitation, learning, and what he calls "emulation" from them. And the effect of this is enhanced technology and productivity ("we daily adopt, in every art, the inventions and improvements"). I don't want to overstate the originality of Hume's argument not just because I may be unfamiliar with relevant contemporary authors, but also because it is pretty clear that Hume is extending an important argument by Locke.

Recall that in Locke's art of government (in sections 41-42 of the chapter 5 of "Two Treatises") and in his (1695) "Further Considerations Concerning Raising the Value of Money," Locke advocates for policies that would grow the population and simultaneously grow their skill/productivity. This argument was noticed and emphasized by Toland in his argument for Jewish emancipation (recall). And, in fact, Hume' echoes one of Locke's key arguments. Hume writes, shortly after the passage quoted above, "But if our neighbours have no art or cultivation, they cannot take them; because they will have nothing to give in exchange. In this respect, states are in the same condition as individuals."

In section 43, of Chapter of the Two Treatises, Locke had made the same conceptual point in terms of the American Indian being unable to benefit from the same amount of labor in land as the European because he lacked wealthy neighbors. Locke's point here is often missed because scholars and critics are more focused on debates about his labor theory of value and to what degree these passages support colonialism. But it would be very surprising if Hume had not noticed the point. After all, this is treated as axiomatic by Hume in this essay ("it is obvious, that the domestic industry of a people cannot be hurt by the greatest prosperity of their neighbours;").

I do not mean to ignore the significance of pro-European free trade argument ("a British subject, I pray for the flourishing commerce of Germany, Spain, Italy, and even France itself") lodged at the end of  the little essay. But I have already discussed it in the context of Foucault's arguments of 24 January 1979, lecture 3, The Birth of Biopolitics. 54-6.

 

*To be sure later in the essay Hume articulates a version of the absolute advantage argument; and an argument from portfolio-management/risk spreading due to trade diversification.