Adam Smith · Economics
Smith’s demolition of mercantilism and his case for open commerce - that trade is mutual gain, not a zero-sum war for gold - and the powerful objections it provoked.
Much of The Wealth of Nations is a sustained assault on the dominant economic doctrine of Smith’s age: mercantilism. The mercantilists held that wealth is gold and silver; that the world’s wealth is fixed, so trade is a zero-sum contest in which one nation gains only at another’s expense; and that a country therefore grows rich by running a trade surplus - exporting more than it imports so as to accumulate bullion. From these premises followed the whole apparatus of mercantile policy: high tariffs and outright bans on imports, subsidies and monopolies for favoured exporters, and jealously guarded colonial trade. Smith attacked the entire system at its root, arguing that its founding premise - that wealth is gold - was simply false, and that the policies built on it made nations poorer, not richer, by strangling the productive exchange that actually creates wealth.
Smith’s central insight about trade is that voluntary exchange is positive-sum - both parties gain, or they would not agree to it. When two people, or two nations, trade freely, each gives up something it values less for something it values more; both end up better off. This is as true between countries as between individuals. The mercantilist fear of imports is therefore confused: imports are not a loss but a gain - they are the useful goods we get in exchange for our exports, and the whole point of exporting is to be able to import. A nation that exported endlessly and imported nothing, piling up gold it never spent, would be like a man who sold everything he made and bought nothing he needed - absurdly missing the point of commerce. The purpose of production, Smith insists, is consumption; the purpose of exporting is to import; and trade enriches both partners by letting each obtain, more cheaply through exchange, what it would be costly to make for itself.
Smith’s case for specialisation and free trade rests on one of the most influential analogies in economics: the nation as a prudent household. Every sensible family, he observes, follows a simple maxim - never make at home what it costs more to make than to buy. The tailor buys his shoes from the shoemaker rather than cobbling them himself; the shoemaker buys his coat from the tailor; the farmer buys both from the tradesmen and sells them his corn and cattle. Each does what he does best and exchanges for the rest, and the whole community is richer for the specialisation than if each tried to be self-sufficient. What holds for individuals holds for nations: if a foreign country can supply us a commodity cheaper than we can make it ourselves, it is folly to ban the import and make it expensively at home; better to buy it with the produce of our own industry, employed in the lines where we have an advantage. Restricting imports to ‘protect’ domestic producers does not enrich the nation; it merely forces its labour and capital out of the uses where they are most productive and into uses where they are less so, making the whole country poorer in order to benefit a particular protected interest. Free trade, by contrast, lets each nation specialise according to its advantages and exchange for the rest - the international extension of the division of labour that drives all prosperity. The argument is so intuitive at the level of the household that its application to nations feels irresistible - which is exactly why it became the founding case for free trade, and why its critics had to work so hard to show where the household analogy might break down.
This is the opening of the lesson. The rest — the dialogue, the primary source, and the recall — is in the app.
You learned Smith’s case against mercantilism and for free trade. Explain why he thought trade is mutually beneficial rather than a zero-sum contest, and one serious objection to leaving trade entirely free, in your own words.
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