Throughout modern history a variety of perspectives on capitalism have evolved based on different schools of thought.
Overview Adam Smith was one of the first influential writers on the topic with his book The Wealth of Nations, which is generally considered to be the start of classical economics which emerged in the 18th century. Karl Marx took a different approach, seeing capitalism as a historically specific mode of production and as a phase of economic development that would pass and be replaced by communism. In conjunction with his criticism of capitalism, Marx believed that exploited labor would be the driving force behind a social revolution to a socialist-style economy. For Marx, the cycle of the extraction of the surplus value by the owners of capital or the bourgeoisie becomes the basis of class struggle. This argument is intertwined with Marx's version of the labor theory of value, asserting that labor is the source of all value and thus of profit. Max Weber considered market exchange rather than production as the defining feature of capitalism. In contrast to their counterparts in prior modes of economic activity, capitalist enterprises feature rationalization of production, directed toward maximizing efficiency and productivity; a tendency leading to a sociological process of enveloping rationalization. According to Weber, workers in pre-capitalist economic institutions understood work in terms of a personal relationship between master and journeyman in a guild, or between lord and peasant in a manor. Institutional economics, once the main school of economic thought in the 20th-century United States, holds that capitalism cannot be separated from the political and social system within which it is embedded. In the late-19th century, the German Historical School of economics diverged from the emerging Austrian School of economics (which originated in 1871), led at the time by Carl Menger (1840-1921). Later generations of followers of the Austrian School continued to be influential in Western economic thought through much of the 20th century. The Austrian economist Joseph Schumpeter (1883-1950), a forerunner of the Austrian School, emphasized the creative destruction of capitalism — the fact that market economies undergo constant change. The Austrian economists Ludwig von Mises and Friedrich Hayek were among the leading defenders of market economy against 20th-century proponents of socialist planned economies. Among Mises's arguments were the economic calculation problem, which was first proposed by Mises in 1920 and later expounded by Hayek. The problem referred to is that of how to distribute resources rationally in an economy. The free market solution is the price mechanism, wherein people individually have the ability to decide how a good or service should be distributed based on their willingness to give money for it. Mises and Hayek argued that only market capitalism could manage a complex, modern economy. Partially opposed to that view, the British economist John Maynard Keynes argued in his 1937 The General Theory of Employment, Interest, and Money that capitalism suffered a basic problem in its ability to recover from periods of slowdowns in investment. Keynes argued that a capitalist economy could remain in an indefinite equilibrium despite high unemployment. Keynes tried to provide solutions to many of Marx’s problems without completely abandoning the classical understanding of capitalism. His work attempted to show that regulation can be effective and that economic stabilizers can rein in the aggressive expansions and recessions that Marx disliked. These changes sought to create more stability in the business cycle and reduce the abuses of laborers. Keynesian economists argue that Keynesian policies were one of the primary reasons capitalism was able to recover following the Great Depression. Supply-side economics developed during the 1970s in response to Keynesian economic policy and in particular the failure of demand management to stabilize Western economies during the stagflation of the 1970s in the wake of the oil crisis in 1973. It drew on a range of non-Keynesian economic thought, particularly Austrian School thinking on entrepreneurship and new classical macroeconomics. The intellectual roots of supply-side economics have also been traced back to various early economic thinkers such as Ibn Khaldun, Jonathan Swift, David Hume, Adam Smith and Alexander Hamilton. Typical policy recommendations of supply-side economics are lower marginal tax rates and less regulation. Maximum benefits from taxation policy are achieved by optimizing the marginal tax rates to spur growth, although it is a common misunderstanding that supply side economics is concerned only with taxation policy when it is about removing barriers to production more generally. As of 2026, the majority academic research on capitalism in the English-speaking world draws on neoclassical economic thought. It favors extensive market coordination and relatively neutral patterns of governmental market regulation aimed at maintaining property rights; deregulated labor markets; corporate governance dominated by financial owners of firms; and financial systems depending chiefly on capital market-based financing rather than state financing. Milton Friedman took many of the basic principles set forth by Adam Smith and the classical economists and gave them a new twist. One example of this is his article in the September 1970 issue of The New York Times, where he claims that the social responsibility of business is "to use its resources and engage in activities designed to increase its profits…(through) open and free competition without deception or fraud". This is similar to Smith’s argument that self-interest in turn benefits the whole of society. Work like this helped lay the foundations for the coming marketization (or privatization) of state enterprises and the supply-side economics of Ronald Reagan and Margaret Thatcher. The Chicago School of economics is best known for its free market advocacy and monetarist ideas. According to Friedman and other monetarists, market economies are inherently stable if left to themselves and depressions result only from government intervention.
Classical political economy
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