{
  "id": "adam-smith",
  "title": "Adam Smith",
  "lang": "en",
  "source_lang": "en",
  "summary": "Scottish philosopher and economist (1723–1790), author of The Theory of Moral Sentiments and The Wealth of Nations, often regarded as a founder of modern economics.",
  "category": "economics",
  "subcategory": "microeconomics",
  "type": "person",
  "aliases": [
    "亚当·斯密",
    "Smith, Adam",
    "Adam Smith (economist)"
  ],
  "generated_at": "2026-10-16",
  "model": "pro/claude-haiku-5-5",
  "url": "https://aiwiki.page/en/adam-smith/",
  "translations": {
    "zh-Hans": {
      "url": "https://aiwiki.page/zh/adam-smith/",
      "json": "https://aiwiki.page/zh/adam-smith.json"
    }
  },
  "sections": [
    {
      "heading": "",
      "text": "Adam Smith (1723–1790) was a Scottish moral philosopher and political economist whose two major books, The Theory of Moral Sentiments (1759) and An Inquiry into the Nature and Causes of the Wealth of Nations (1776), shaped the study of economics and of human conduct in society. He taught at the University of Glasgow and belonged to the circle of the Scottish Enlightenment, working alongside thinkers such as David Hume. His analysis of the division of labour, market exchange, prices and the distribution of income made him one of the central figures of what later became known as classical economics.\n\nHe is widely regarded as a founder of modern economic thought, and his arguments against mercantilist trade policy, his account of productivity and his treatment of taxation and public finance remain part of the standard vocabulary of the discipline. His moral philosophy, centred on sympathy and the figure of the impartial spectator, is equally important for understanding how he conceived self-interest, social order and the limits of market activity. Later critics, including Karl Marx, built on or reacted against his labour-based account of value and his view of capitalist society.\n\nThis entry follows his life and intellectual formation, then his moral philosophy and his jurisprudence, before turning to the main economic arguments of The Wealth of Nations: the division of labour and the market, value and distribution, trade policy, capital and money, and the role of the state. It closes with his influence, the translation and reception of his work in China and elsewhere, and the continuing interpretive debates about his thought."
    },
    {
      "heading": "Life and intellectual formation",
      "text": "Adam Smith was baptised on 5 June 1723 in Kirkcaldy, a small, thriving port on the Fife coast of Scotland. His father, also Adam Smith, was a customs official who died a few months before his son was born, and the boy was raised by his mother, Margaret Douglas. The family's modest means were supported by the inheritance and guardianship arrangements that followed the father's death, which gave the boy a stable upbringing in Kirkcaldy.\n\nSmith entered the University of Glasgow in 1737, at about fourteen, which was not unusual for the period. There he came under the influence of Francis Hutcheson, the charismatic professor of moral philosophy whose lectures on human sociability and the moral sense shaped the questions Smith would pursue for the rest of his career. Glasgow's commercial character also mattered: the port was deeply involved in the transatlantic tobacco trade, and its merchant milieu formed part of the world Smith observed as a young man.\n\nIn 1740 Smith won a Snell Exhibition to Balliol College, Oxford. His time there was far less rewarding. He judged the quality of instruction poorly, and later wrote that most of the public professors had given up even the pretence of teaching. He nonetheless made extensive use of the Oxford libraries, reading widely in English, French, Greek and Latin literature. He left in 1746 and returned to Kirkcaldy.\n\nBack in Scotland, Smith had no secure position. He began giving public lectures in Edinburgh from 1748 under the patronage of Lord Kames. The early courses dealt with rhetoric and belles-lettres, but Smith later turned to \"the progress of opulence\" and the economic philosophy of \"the obvious and simple system of natural liberty\", themes that would later run through his major books. These lectures established his reputation and brought him into the circle of Edinburgh's intellectual life, where he formed a close friendship with David Hume that lasted until Hume's death in 1776. Both men are central figures of the Scottish Enlightenment, a context in which questions of ethics, history and political economy were pursued together.\n\nIn 1751 Smith was appointed professor of logic at Glasgow, and in the following year he moved to the chair of moral philosophy. His lectures covered the field of ethics, rhetoric, jurisprudence and political economy, or \"police and revenue.\" Smith later described these years as among the happiest and most honourable of his life. The ethical and jurisprudential material from these courses formed the basis of The Theory of Moral Sentiments, published in 1759.\n\nIn late 1763 Smith resigned his Glasgow post to become the private tutor of the young Duke of Buccleuch. Some accounts date the end of his Glasgow professorship to 1764. He accompanied the duke on a tour of France and Switzerland; the length of the journey is reported variously, with one account describing more than two years of travel. The arrangement was financially significant: the duke gave Smith a pension equal to his salary as tutor, which allowed him to leave his university post and devote himself to political philosophy.\n\nIn France, Smith met a wide circle of thinkers. He came to know intellectual leaders such as Turgot, D'Alembert, André Morellet and Helvétius and, in particular, François Quesnay, the head of the Physiocratic school. The Physiocrats argued for relaxing trade barriers and for broadly laissez-faire policies, and their ideas both stimulated and provoked him. Scholars generally note, however, that Smith had already worked out many of his basic principles before the journey, so the French encounters refined and tested views he already held rather than creating them. The influence of Physiocracy is most visible in his later treatment of agriculture and of economic policy.\n\nSmith returned to Kirkcaldy in 1766 and spent much of the following decade there writing. The work that resulted, the Wealth of Nations, appeared in March 1776. In his last years he lived in Edinburgh. In 1778 he was appointed commissioner of customs in Scotland and went to live with his mother in Edinburgh. Some biographical sources give 1777 as the year he took up the post. He resided at Panmure House in the Canongate from 1778 until his death, and during this period he produced four new editions of The Wealth of Nations between 1778 and 1789. He was also still revising The Theory of Moral Sentiments when he died. Adam Smith died on 17 July 1790, in Edinburgh. He never married, and at his request most of his handwritten notes on these subjects were posthumously destroyed."
    },
    {
      "heading": "The Theory of Moral Sentiments",
      "text": "Smith's first major book, published in 1759 while he held the Glasgow chair, begins from a question of moral psychology: how do people come to approve or disapprove of conduct, their own included? His answer rests on sympathy, the capacity to imagine oneself into the situation and feelings of another. An observer who sympathises with an agent can judge whether the agent's passions are proportionate to their causes. Smith therefore locates moral judgement in feeling shaped by social interaction, not in reason alone or in a single special faculty of moral sense. He also moves beyond the utility-based accounts associated with David Hume and Francis Hutcheson, which is why the book is read as part of the wider Scottish Enlightenment debate over the foundations of ethics.\n\nSympathy alone is partial, since we feel most strongly for those near us and for those whose situations we can readily picture. Smith therefore introduces the impartial spectator, an internalised observer who views our conduct as a disinterested stranger would. Through this figure we learn to judge our own actions by the standards that others could share, and conscience emerges from that process. The spectator is the central device of the book, although its meaning shifts between editions: in the later text Smith distinguishes between the judgements of actual onlookers and those of an ideal observer whose standards are not dependent on social opinion.\n\nSmith then classifies the virtues that follow from this moral psychology. Prudence concerns the care of one's own health, fortune and reputation. Beneficence is the disposition to promote the happiness of others, combining gratitude and charity. Justice is a different kind of duty: it is largely negative, consisting in the avoidance of harm, and it admits of the most exact rules. Smith holds that society cannot survive without justice, which he describes as the pillar holding up the whole structure. Self-command, the moderation of passion in accordance with what the impartial spectator would approve, makes the other virtues effective, because passions can mislead even well-intentioned people. Smith separates the \"amiable\" virtues, which arise from the spectator's sympathy, from the \"respectable\" ones, which arise from the agent's self-command.\n\nThe book also examines the human desire for approval and its effects on social life. Smith observes that people tend to admire the rich and powerful, and that they seek wealth and rank largely because these bring esteem and a sense of being noticed. He treats this disposition as a source of moral distortion, since it can lead people to confuse wealth with virtue and to neglect the poor. Smith nonetheless argues that the economic arrangements which concentrate wealth also, through an \"invisible hand\", lead the rich to distribute the necessities of life among those who serve them, producing a rough distribution of the means of subsistence. The moral consequences of inequality are thus ambiguous in his account: they foster admiration for the wrong qualities and corrupt sentiments, yet they contribute to social order.\n\nThe text was revised across six editions between 1759 and 1790. The second edition appeared in 1761, and the third, fourth and fifth editions contained only light changes. The sixth edition, published in 1790, shortly before Smith's death in July of that year, was substantially reworked. Smith added a new part on the character of virtue and revised many earlier passages, including the discussions of conscience, self-command and the role of custom. The Glasgow critical edition edited by D. D. Raphael and A. L. Macfie (1976) documents these changes in detail, and scholars differ over how far the later revisions altered the book's original argument."
    },
    {
      "heading": "Jurisprudence and the stadial account of history",
      "text": "Smith's lectures on jurisprudence at Glasgow survive only as student notes. There are two sets, one from the 1762–63 session (usually labelled LJ(A)) and one from lectures of 1766 (LJ(B)). The two versions present the material in different orders and differ in length. LJ(A) is the fuller of the two, so editors have had to reconstruct the course by comparing them. The lectures were later published in the Glasgow Edition of Smith's works, with the title Lectures on Justice, Police, Revenue and Arms used for some editions.\n\nThe organising framework of the lectures is the so-called four-stages theory. In the 1766 notes the sequence is hunting, pasturage, farming and commerce. LJ(A) calls the stages the ages of hunters, shepherds, agriculture and commerce. Each stage rests on a characteristic mode of subsistence, and Smith argues that the rules governing acquisition, property and authority change as a society moves from one stage to the next. To illustrate the earliest stage, he imagines shipwrecked people on a desert island who live on the fruits of the soil and the wild animals they can kill.\n\nThe theory is applied first to property. In the age of hunters, ownership extends little beyond what a person holds or has seized, so occupation is the main legal category. Herding allows wealth to accumulate in moveable form, and inequality grows, with consequences for authority inside the community. In the agricultural stage, landed property becomes dominant, and Smith treats its extension as the most significant development in the law of property. Commerce brings contracts, credit and moveable wealth to the centre of economic and legal life.\n\nThe same schema structures his account of government. Smith links the rise of civil government to the need to protect accumulated property and to settle disputes over it. He presents the administration of justice as necessary once property is unequal enough to generate conflict that informal means cannot contain. Commercial society, in his account, is the stage at which security of property, regular justice and personal liberty become more firmly established, which connects the history of trade to the rule of law. He also notes the costs of this development. Extreme specialisation of labour can narrow the minds of ordinary workers, a concern that he returns to when discussing education.\n\nInterpreters disagree about how deterministic the theory is. Some read it as a fixed scheme in which legal and political change follows from successive modes of subsistence. Others argue that the specific examples in the lectures do not reduce legal development to a single pattern, and that the stages work as an organising framework rather than a law of history. The scheme also has no explicit statement in The Wealth of Nations, although scholars often find an implicit reference in its opening contrast between living standards among hunting peoples and those of civilised nations. The lectures therefore supply the historical background against which the economic analysis of The Wealth of Nations is developed, including its treatment of the growth of commerce and manufacturing, the protection of property and the role of government in securing the rule of law."
    },
    {
      "heading": "The Wealth of Nations: scope, method and structure",
      "text": "Smith's An Inquiry into the Nature and Causes of the Wealth of Nations appeared on 9 March 1776, in two volumes, with Books I–III in the first and Books IV and V in the second. The Wealth of Nations was published in two volumes on 9 March 1776. Its central move was to challenge the mercantilist equation of national wealth with stocks of precious metal. Smith located real riches in the goods a society yields each year, which he saw as the product of its labour and the resources that labour works with. The prevailing wisdom was that wealth consisted in money, in precious metals like gold and silver. Smith insists that real wealth is in fact what money buys. The question that organises the whole inquiry is therefore what determines the size of this annual product and what makes it grow over time.\n\nThe book is divided into five parts. Its opening books deal with the productivity of labour, the accumulation of capital, the historical development of economic policy, and the principles of political economy, while the last book turns to the functions of government and its finances. Smith's own plan placed public revenue and the borrowing of governments at the end, after the analysis of production and exchange. The result is a work that moves from the workshop and the market to the statecraft of taxation and debt.\n\nSmith's method combined abstract reasoning with empirical material. General propositions about prices, wages, profits and rents sit alongside historical narratives about the rise of commerce in Europe and comparative observations about other regions. He refers to the North American colonies, where he believed labour was well rewarded and population grew quickly, and to China, which he described as a rich but stationary economy that had stopped advancing. These comparisons serve to test his explanations: if a society's growth depends on the accumulation of stock and the extent of the market, its experience elsewhere should illustrate the same forces.\n\nThe best-known concrete illustration is the pin factory in the opening chapter of Book I. Using the famous example of pins, Smith asserted that ten workers could produce 48,000 pins per day if each of eighteen specialized tasks was assigned to particular workers. By contrast, a worker who carried out every step alone could make very few pins, and Smith suggested that a workman not educated to this business could scarce, perhaps, with his utmost industry, make one pin in a day, and certainly could not make twenty. Dividing the output by the number of workers gives an average productivity of 4,800 pins per worker per day, a per-head measure that allowed Smith to compare methods of production directly.\n\nThe example's empirical basis has been questioned. Using French production data from the eighteenth century, one historian has argued that Smith's pin factory, with daily production of twelve pounds, around 50,000 typical pins, could not have operated as he described. The same account notes that the forests of Normandy contained several hundred pin factories throughout the eighteenth century. The figures should therefore be read as an analytical illustration of the logic of specialisation rather than a record of a single observed workshop.\n\nSmith's aim was practical as well as theoretical. The book criticises existing policies, including bounties, monopolies and trade restrictions, and sets out reforms in commercial regulation, taxation and public institutions. Its diagnostic chapters are thus designed to support recommendations, and the abstract analysis of value and distribution is meant to explain why certain policies raise or lower the annual product of a nation."
    },
    {
      "heading": "Division of labour and the market economy",
      "text": "Smith opens The Wealth of Nations with the pin factory, a small workshop he said he had seen. Making a pin, he explained, involved about eighteen distinct operations. A worker who attempted all of them alone could hardly make one pin a day, but ten workers who each handled a few operations could together make about 48,000 pins daily, or roughly 4,800 per person. The gain came from repetition, from less time lost switching between tasks, and from tools suited to narrow jobs. The example is still a standard illustration, but it has been challenged: Smith gave no measured output for a lone worker, and critics argue that his one-person figure is an assertion rather than an observation.\n\nSmith located the origin of the division of labour in a human \"propensity to truck, barter, and exchange.\" He did not treat specialisation as the product of deliberate planning. It developed slowly, as people found it easier to trade surplus goods for what they needed than to produce everything themselves. In the third chapter of Book I, he added a limit: the extent of specialisation depends on the extent of the market. If a producer can sell only within a small locality, no one can devote himself entirely to a single trade. Smith illustrated the point with a nailmaker in a remote part of the Scottish Highlands, who could never sell a year's output locally. Large towns, by contrast, support trades that would be impossible in villages, and wider commerce, including foreign trade, allows still finer specialisation. On this reasoning, expanding markets raise productivity, which links the division of labour directly to the politics of trade discussed later in the work.\n\nSmith's account of coordination rests on self-interested exchange. People obtain their food from the butcher, the brewer and the baker not because these men are benevolent but because they pursue their own advantage, and the same logic extends across the economy. In Book IV, Smith described a merchant who prefers to invest in domestic industry because it is more secure and more profitable. Such a person intends only his own gain, yet is \"led by an invisible hand\" to advance an end he did not intend, and Smith added that society is not always worse off for this. The phrase appears in only one passage of the book, and it is a passing metaphor rather than a formal theory. Smith nevertheless framed the wider idea as a \"system of natural liberty,\" in which individuals may pursue their interests and compete with one another, provided they respect the laws of justice. That phrase is important because it ties the market to a set of sovereign duties: defence, the administration of justice, and certain public works.\n\nSmith did not present the market as self-sustaining, and this section should be read with his qualifications. Markets depend on enforceable property rights, contracts and courts, which is why he treated justice as the foundation on which commerce rests. He was also concerned about the human cost of extreme specialisation. A worker who spends a whole working life repeating a few simple operations, Smith argued in Book V, may lose the capacity for judgement and become mentally diminished. He saw this as a problem that the state, and especially the provision of education, might need to address. The efficiency of the pin factory was therefore, for Smith, inseparable from questions about institutions and the wellbeing of the people who worked within them."
    },
    {
      "heading": "Value, prices and the distribution of income",
      "text": "Smith begins his account of value by separating two senses of price. The nominal price of a commodity is the sum of money for which it sells, while its real price is the labour needed to produce it. In The Wealth of Nations he treats labour as the ultimate measure of exchange value, because money itself varies in value over time. A commodity's worth to its owner is therefore the quantity of others' labour it can command in exchange, and this is the core of what is often called the labour theory of value.\n\nSmith also confronts the diamond–water paradox: water is indispensable yet exchanges for little, while diamonds are useless by comparison yet exchange for a great deal. His explanation is that exchange value does not follow from usefulness. It follows from the effort required to obtain a good and the quantity of labour that its possessor can therefore purchase. Usefulness sets the limits of demand, but relative labour cost governs what is actually exchanged.\n\nMarket prices, in Smith's account, fluctuate around a central level he calls the natural price. When demand for a good exceeds the quantity supplied, its market price rises above the natural price, and when supply exceeds demand it falls below. Competition among producers and buyers then tends to pull prices back toward the natural level, which is the sum of the natural rates of wages, profit and rent that must be paid for the good to be brought to market. This is an early statement of the logic later formalised in supply and demand analysis, though Smith's emphasis lies on long-run costs rather than short-run balancing.\n\nWages, profits and rent\n\nSmith identifies wages, profits and rent as the three original sources of revenue and as the components of all exchangeable value. Wages are the reward of labour, profits the return on the stock of capital that employers advance, and rent the payment for the use of land. Each has a natural rate determined by the condition of society rather than by any single fixed law.\n\nWages are shaped by the demand for labour and by the subsistence needs of workers. Smith argues that in a society which is growing, the demand for workers outpaces their supply, so wages rise above bare subsistence. In a stationary economy wages settle near subsistence, and in a declining one they can fall below it. He also notes that the bargaining position of workers is weaker than that of employers, who are fewer in number and can more easily combine to hold wages down. This makes the labour market a site of unequal power, not only of mutual agreement.\n\nProfits move in the opposite direction over time. As capital accumulates, more investors compete for the same opportunities and the rate of return tends to fall, even as the total sum of profit grows. Rent, by contrast, rises with the improvement of land and the growth of population, because landlords can charge more for the use of a more productive or more sought-after resource. Smith regards rent as a payment for a natural advantage rather than a reward for the landowner's effort, a point that makes inequality of income a moral as well as an economic question.\n\nDivergent paths across societies\n\nSmith's distributional analysis is comparative. In progressive economies, where capital and population grow together, high wages and falling profits are typical. In rich but mature economies, profits are low and wages are stable. Newly settled regions with abundant land and capital can offer high profits. These patterns depend on the rate of accumulation and on the relative scarcity of labour, capital and land, which means that the distribution of income is not fixed but reflects historical circumstances.\n\nSmith's own qualifications limit the labour measure. In an \"early and rude\" society, the labourer may keep the entire product of his work, so labour alone fixes value. In an advanced economy, part of the product must be surrendered as rent and profit, and the price of goods then includes these revenues as well. The labour theory therefore captures the underlying origin of wealth but does not, on its own, explain every observed price, a tension that later economists, including Karl Marx and the marginalists, approached in very different ways."
    },
    {
      "heading": "Critique of mercantilism and the case for free trade",
      "text": "Smith's most sustained attack on the economic policy of his time appears in Book IV of The Wealth of Nations, where he describes the prevailing outlook as the \"mercantile system\". Its central tenet held that a nation's wealth consisted in the gold and silver it accumulated, and that this stock could grow only through a favourable balance of trade, meaning exports that exceeded imports. Smith rejected the equation of wealth with money. Coin, in his account, was a costly instrument of circulation; the real wealth of a nation lay in the annual produce of its land and labour and in the goods available for consumption. He also drew on arguments developed by David Hume, who had shown that bullion flowed into and out of a country in line with its needs. On this view, policies designed to hoard specie were both unnecessary and harmful.\n\nSmith examined the specific instruments through which the mercantile system operated. Bounties, paid to producers of certain exports, were funded by taxpayers and tended to raise domestic prices. Import duties shielded domestic manufacturers from foreign competition, so that consumers paid more for inferior goods. Monopolies, whether granted through corporate charters, guild privileges or exclusive grants, allowed producers to restrict entry and keep prices high. The Navigation Acts required that colonial and imported goods be carried in British or colonial vessels, raising freight costs. Smith accepted that the Navigation Acts could be defended on the grounds of national defence, which he regarded as more important than opulence, but he maintained that most such measures benefited particular producers at the expense of consumers and the wider public. In his view, the purpose of all production was consumption, and policies that subordinated consumption to the interests of producers were therefore misdirected.\n\nThe positive case for trade rested on the idea that exchange enlarges the scope for productive specialisation. Foreign trade offered a \"vent for surplus\", allowing a country to sell output beyond its domestic demand so that land and labour that would otherwise lie idle could be employed. Smith illustrated the principle with an analogy: a prudent household does not make its own clothes if a tailor can supply them more cheaply, and the same reasoning applies to a nation. Restrictions on trade therefore reduced the division of labour and narrowed the extent of the market, which, as he had argued in his account of specialisation, limited productivity. Smith's argument turned mainly on absolute advantage, the idea that a country should buy goods it can obtain more cheaply abroad. The more general formulation of comparative advantage was developed later by David Ricardo.\n\nSmith was also highly critical of the colonial system and the privileged trading companies that operated within it. Colonies were required to trade principally with the mother country, and Smith argued that this monopoly drew capital into channels that would not otherwise have attracted it, while enabling merchants to earn excessive profits at the expense of both the colonies and British consumers. He reserved particular criticism for exclusive chartered companies, of which the East India Company was the principal example. He doubted that joint-stock enterprises managed by agents rather than owners could be efficient in trade, and he argued that the exclusive privileges of such companies imposed costs on the societies with which they dealt. These arguments connect his economic analysis to his wider concern with the costs of empire, a theme that is considered further below.\n\nSmith's position, however, was not one of unrestricted free trade. He acknowledged several circumstances in which protection could be justified. Defence was the most obvious exception, and the national interest in maintaining naval strength could outweigh the cost of higher prices. He also accepted that duties could be used as retaliation to induce a foreign power to lift its own restrictions, and that temporary protection might be appropriate for a young industry until it could compete. Duties on imported goods that matched domestic excise taxes were, in his view, a legitimate means of avoiding an unequal burden on domestic producers. Smith therefore advocated the gradual removal of restrictions as part of what he called a system of natural liberty, while recognising that the transition to such a system required careful judgement about particular cases."
    },
    {
      "heading": "Capital, money and banking",
      "text": "Smith's account of capital begins with how a stock is employed. Capital that earns its return by changing hands, through buying, selling or turning materials into finished goods, is circulating capital. Capital that earns its return while staying with its owner, such as machinery, buildings, improved land or useful skills, is fixed capital. A merchant's stock is wholly circulating, whereas a manufacturer holds both kinds, and a farmer's labouring animals count as fixed capital while the animals raised for sale count as circulating. Smith stresses that the two depend on each other. Fixed capital exists to raise the productive power of labour, so that the same workers can produce far more, but it yields no revenue unless circulating capital supplies the materials and wages that keep it running.\n\nAccumulation is central to Smith's view of growth. A nation's wealth, in his account, is the stock of capital it has built up over time, and that stock is created when part of income is set aside and invested rather than consumed. Saved funds are advanced to productive labour, which means the rate at which a country grows depends on how much of its output is directed toward new machinery, improvements and the wages of workers, and how little is spent on immediate consumption. This emphasis on productive employment of savings explains Smith's interest in the institutions that channel money from savers to producers, above all banks.\n\nSmith regarded paper money as a means of economising on metal. Gold and silver were expensive to hold, and notes that could be redeemed in specie on demand let a country replace much of its coinage with paper, freeing the precious metal for imports of consumption goods or for productive investment abroad. By the 1770s, Scottish banknotes dominated everyday transactions and coin rarely circulated. Smith also recognised the danger of overissue. Banks had a self-interest in keeping notes redeemable, since excessive issue drained their reserves, yet he observed that bold projectors could still push notes beyond what trade required. Several restrictions followed from this concern. The Bank Notes (Scotland) Act of 1765 barred notes below £1 and outlawed the optional clause that let banks delay redemption, and Smith argued for a minimum note of £5. He also held that competition among many banks reduced the damage from any single failure.\n\nSmith's preferred discipline on bank lending was the real bills doctrine. Banks, in his view, should discount short-term commercial bills that financed actual sales of goods, so that loans were repaid when the goods were sold. Lending through cash accounts was another channel. Scholars disagree about how far this doctrine was Smith's own. Some readers treat it as a central element of his banking theory, while others point out that he gave no practical method for telling a real bill from a fictitious one, and that his rule is better understood as a response to the shocks Scottish banks had suffered, notably the financial crisis of 1772.\n\nSmith's treatment of interest combined market reasoning with a practical exception to free contracting. He accepted that the price of borrowed money should be paid, but he defended a legal ceiling on the rate, which in Britain stood at 5 per cent. He argued that the ceiling should sit somewhat above the lowest market rate: set too low, it would effectively prohibit interest and cut off credit to borrowers who could not offer the best security; set too high, the bulk of available funds would go to spendthrifts and speculators willing to pay steep rates. Jeremy Bentham's Defence of Usury (1787) criticised this position, and modern interpreters continue to debate whether the exception sits uneasily with Smith's broader presumption of liberty, or whether it reflected his concern to keep scarce capital flowing to productive uses at the threshold of the industrial revolution."
    },
    {
      "heading": "The role of the state and public finance",
      "text": "In Book V of The Wealth of Nations, Smith asks what the sovereign or commonwealth should do and how it should pay for it. He identifies three duties. The first is national defense: the duty to protect society against the violence and invasions of neighboring countries. The second is the exact administration of justice, which protects each member of society from injustice and oppression by others. The third concerns public institutions and public works that are very advantageous to a large society but whose profit could never repay their cost to an individual or small group. Smith holds that the expense of each duty varies with the stage of social development, which links this book to his stadial account of history.\n\nThe third duty is the one that most clearly justifies state provision. Smith's examples include roads, bridges, canals, harbours and primary education. He does not think these must be paid from general revenue. The greater part of such public works may easily be so managed as to afford a particular revenue sufficient for defraying their own expence, for instance through tolls or user charges. Even for schools, Smith prefers that teachers be paid partly by the public and partly by the families who use them, since a teacher paid wholly by the state would soon learn to neglect his business.\n\nPublic revenue came, in Smith's account, from two sources: taxes and borrowing. He describes the British system of his day as resting on the land-tax, the stamp-duties, and the different duties of customs and excise. He is critical of stamp duties and registration fees on property transfers, arguing that they reduce the capital value of property and thereby shrink the funds available to maintain productive labour. Smith also observes that governments learn quickly how to extract revenue from the public, but far more slowly how to avoid the privileges that distort it.\n\nSmith's Canons of Taxation set out four principles that a good tax system should meet: equality, certainty, convenience of payment and economy in collection. The canons require that taxes be proportioned to the revenue that subjects enjoy under the state's protection, that the tax which each individual is bound to pay ought to be certain, and not arbitrary, that payment be timed and made in a manner convenient to the taxpayer, and that the cost of collection be kept low. As an example of convenience, Smith notes that taxing little by little, as a consumer buys a good, is generally more convenient than paying a large tax all at once.\n\nSmith's treatment of public debt is among his most pessimistic passages. He describes how governments, once ordinary revenue was exhausted, pledged specific branches of revenue to lenders, sometimes for a fixed term and sometimes in perpetuity. By now the greater part of taxes previously anticipated for short terms are perpetual ones, paying only the interest of the debt. For Smith, this is the birth of the most ruinous practice of perpetual funding. He also argues that borrowing shifts capital from the support of productive labour to the support of unproductive labour, so that the debt is in effect wasted capital. He accepts that borrowing may be defensible in wartime, partly because it makes the full burden of war visible to the public and so may restrain the readiness to fight. Once debt grows so large that repayment is unrealistic, Smith's logic points to either higher taxes or reduced spending, and he doubts that governments will choose the latter voluntarily. Public debt is treated in more detail elsewhere in this article.\n\nSmith's argument about education rests on his account of the division of labour. He holds that the education of the common people requires, perhaps, in a civilized and commercial society the attention of the public more than that of people of some rank and fortune. Children of the labouring poor begin work early and have little time to acquire the basic skills of reading, writing and accounting. Repetitive labour, he argues, narrows the mind and can leave workers with little capacity for wider thought, so the state has a role in counteracting these effects. His proposals are modest: a little school in each parish, where fees are low enough for ordinary workers to pay, and small premiums to encourage children who excel. He also suggests that the public could require an examination in these basic skills before anyone is allowed to enter a trade or corporation. He points to the parish schools of Scotland as evidence that such a system can teach almost the whole common people to read. The approach connects to human capital and to the wider case for public goods that the market alone may under-provide."
    },
    {
      "heading": "Reception, influence and translation",
      "text": "Smith's influence came first through his immediate successors, who turned the scattered arguments of The Wealth of Nations into a more systematic body of theory. David Ricardo took Smith's analysis of value, rent and distribution and organised it into a set of deductive models, in which the relative shares of wages, profits and rents determined how growth would end. Thomas Malthus shared more of Smith's assumptions than his reputation suggests, particularly on the way capital moved from the land toward commerce and manufacturing, and he drew different conclusions about population and rent. John Stuart Mill later carried the tradition forward in his own Principles, revising its treatment of distribution and the prospects for growth. Together these writers formed what is usually called classical economics, and their doctrines were treated as orthodoxy in British economic thought for several decades.\n\nSmith's theory of value also became the starting point for a more radical reading. Karl Marx drew on the labour theory of value in Capital and used it to analyse the exploitation of wage labour and the tendency of profits to fall. Marx accepted much of Smith's account of how labour produced wealth, but rejected the conclusion that the pursuit of self-interest under competitive markets would produce a socially beneficial outcome. In Marx's account, the same market dynamics generated crisis and conflict that would eventually undermine the system of private property.\n\nFrom the 1870s onward, a group of economists associated with the marginalist revolution rejected the labour theory of value altogether. Writers such as Carl Menger, William Stanley Jevons and Léon Walras located the determination of value in subjective preferences and in the utility of the last unit consumed or produced, rather than in the labour embodied in goods. This shift moved economic analysis toward the framework that later became neoclassical economics. Smith's name remained prominent in these debates, but his work was increasingly treated as a historical precursor rather than a finished theory of price.\n\nSmith also became a standard reference point in arguments over free markets and free trade, especially in Britain and the United States during the nineteenth and twentieth centuries. Advocates of laissez-faire often cited the invisible hand and his criticism of mercantilist protection, while others emphasised his discussions of the state's responsibilities, the moral costs of monotonous labour and the interests of workers. Commentators have frequently observed that the later uses of Smith's ideas were more selective than the text itself, which contains qualifications on monopoly, public services and taxation. This selectivity is part of the reason his reputation has remained contested.\n\nSmith's reach extended well beyond Britain. His book was translated into Chinese by Yan Fu as Yuanfu (原富), with the translation appearing in 1901–1902 from the Nanyang Public Academy in Shanghai. Yan worked on the project during a period when China's defeats and debts made questions of national wealth and power pressing, and he framed economics as a means to strengthen the country. His version was partial: he rendered roughly half of the third edition, omitted passages he judged irrelevant to China, and passed over some of the more theoretical sections in favour of policy material. He also added around 310 explanatory notes, often linking Smith's arguments to Chinese examples or to his own views, and he wrote in classical Chinese, which limited its readership to the educated elite. The translation was nonetheless widely discussed in late Qing reform debates on self-strengthening, and it helped introduce the vocabulary of modern economics into Chinese intellectual life. Subsequent translations were produced, but Yan's version remained influential in shaping how Smith was understood in China."
    },
    {
      "heading": "Interpretive debates and open questions",
      "text": "The so-called \"Adam Smith problem\" is the most enduring interpretive issue in Smith scholarship. In the late nineteenth century, German scholars argued that the sympathy of The Theory of Moral Sentiments and the self-interest of The Wealth of Nations could not be reconciled. The argument took the form of the Umschwungstheorie, the idea that Smith the moral philosopher gradually turned into Smith the economist who saw self-interest as the main human motive. By the time August Oncken published his 1897 article, the scholarly consensus was already moving against this reading. Later commentators, notably Jacob Viner in 1927, argued that The Wealth of Nations had been misread, and that the two books rest on a shared account of human motivation in which self-interest operates alongside sympathy and moral approval. Some recent scholars have revived the question in new forms, most often by asking how a moral theory of sympathy can coexist with a theory of market exchange that treats individuals as acting for their own advantage.\n\nThe invisible hand passage is the second major point of dispute. Smith uses the phrase only once in The Wealth of Nations, in a discussion of why merchants prefer domestic to foreign industry, and the context is narrow. Emma Rothschild's Economic Sentiments (2001) argued that the phrase was a mildly ironic joke and that Smith did not treat it as central to his system. Critics have responded that even if the phrase is marginal, the underlying idea, that individuals pursuing their own advantage can produce socially beneficial outcomes, runs through Smith's arguments for free trade, the abolition of monopolies and the protection of property. Interpreters therefore divide over three readings: the metaphor as a claim about market efficiency, as a limited observation about unintended consequences, or as a moral warning about the power of the rich and the limits of individual knowledge. The question matters because the phrase became a standard reference in later capitalism and welfare-economics debates, often in forms Smith did not explicitly state.\n\nHow far Smith's commitment to free markets extends is also contested. He criticised the apprenticeship system, condemned the collusion of employers, and accepted that the state had duties in education, infrastructure and defence. Those positions make it difficult to describe him simply as an advocate of unregulated markets. Some scholars stress his suspicion of concentrated monopoly power and his concern for the living standards of workers. Others emphasise his hostility to state-granted privileges and his opposition to interference with exchange. The debate is not only about what Smith wrote but about how much weight later readers should give to his treatment of the state, education, and the labouring poor.\n\nSlavery, empire and colonial trade raise a related set of questions. Smith argued that slave labour was inefficient, since enslaved workers had no incentive to work beyond what was needed for their subsistence, and he presented the colonial trading system as costly to the nation as a whole even though it enriched particular merchants and planters. Historians of the Atlantic economy continue to use these arguments as a starting point, but they disagree about their force. Some treat Smith's economic critique as a foundation for abolitionist thinking. Others point out that his criticism of slavery was partly economic in form, and ask whether it reflected a moral position or a strategy aimed at persuading slaveowners that free labour would be more profitable. A further issue is that his analysis of the colonies stops short of a full critique of imperial rule, which leaves the relationship between his theory of free exchange and the structures of empire open to dispute.\n\nFinally, scholars disagree about the sources and chronology of Smith's texts. The Lectures on Jurisprudence survive mainly through student notes, and their reliability is debated, especially where they differ from the published books. The editions of The Theory of Moral Sentiments were revised across Smith's lifetime, and the extent of the changes, and whether they altered his views, remain under study. Equally open is the question of how far his later works, including the substantial changes made before 1790, developed positions already present in his lectures in Glasgow. These issues bear directly on the other questions above: a reading of the invisible hand, or of the relation between sympathy and self-interest, can depend on which text and which version is taken as authoritative."
    }
  ],
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  ],
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