thumb|A world map of countries by their supposed [[International trade#Largest countries or regions by total international trade|trading status in 2000, using the world system differentiation into core countries (blue), semi-periphery countries (yellow) and periphery countries (red). Based on the list in Chase-Dunn, Kawana, and Brewer (2000).]]
thumb|A world map of countries in 1965 colour-coded into 'blocks' based on trade, military interventions, diplomats and treaties:
World-systems theory (also known as world-systems analysis or the world-systems perspective) is a multidisciplinary approach to world history and social change which emphasizes the world-system (and not nation states) as the primary (but not exclusive) unit of social analysis. Core countries have higher-skill, capital-intensive industries, and the rest of the world has low-skill, labor-intensive industries and extraction of raw materials. For a time, certain countries have become the world hegemon; during the last few centuries, as the world-system has extended geographically and intensified economically, this status has passed from the Netherlands, to the United Kingdom and (most recently) to the United States. Components of the world-systems analysis are longue durée by Fernand Braudel, "development of underdevelopment" by Andre Gunder Frank, and the single-society assumption. Longue durée is the concept of the gradual change through the day-to-day activities by which social systems are continually reproduced. Wallerstein traces the rise of the capitalist world-economy from the "long" 16th century (c. 1450–1640). The rise of capitalism, in his view, was an accidental outcome of the protracted crisis of feudalism (c. 1290–1450). Europe (the West) used its advantages and gained control over most of the world economy and presided over the development and spread of industrialization and capitalist economy, indirectly resulting in unequal development. For Wallerstein, world-systems analysis is a mode of analysis that aims to transcend the structures of knowledge inherited from the 19th century, especially the definition of capitalism, the divisions within the social sciences, and those between the social sciences and history. For Wallerstein, then, world-systems analysis is a "knowledge movement" that seeks to discern the "totality of what has been paraded under the labels of the... human sciences and indeed well beyond". "We must invent a new language," Wallerstein insists, to transcend the illusions of the "three supposedly distinctive arenas" of society, economy and politics. The trinitarian structure of knowledge is grounded in another, even grander, modernist architecture, the distinction of biophysical worlds (including those within bodies) from social ones: "One question, therefore, is whether we will be able to justify something called social science in the twenty-first century as a separate sphere of knowledge." Many other scholars have contributed significant work in this "knowledge movement." The Annales School tradition, represented most notably by Fernand Braudel, influenced Wallerstein to focus on long-term processes and geo-ecological regions as units of analysis. Marxism added a stress on social conflict, a focus on the capital accumulation process and competitive class struggles, a focus on a relevant totality, the transitory nature of social forms and a dialectical sense of motion through conflict and contradiction.
World-systems theory was also significantly influenced by dependency theory, a neo-Marxist explanation of development processes.
Other influences on the world-systems theory come from scholars such as Karl Polanyi, Nikolai Kondratiev and Joseph Schumpeter. These scholars researched business cycles and developed concepts of three basic modes of economic organization: reciprocal, redistributive, and market modes. Wallerstein reframed these concepts into a discussion of mini systems, world empires, and world economies.
Wallerstein sees the development of the capitalist world economy as detrimental to a large proportion of the world's population. Wallerstein views the period since the 1970s as an "age of transition" that will give way to a future world system (or world systems) whose configuration cannot be determined in advance.
Other world-systems thinkers include Oliver Cox, Samir Amin, Giovanni Arrighi, and Andre Gunder Frank, with major contributions by Christopher Chase-Dunn, Beverly Silver, Janet Abu Lughod, Li Minqi, Kunibert Raffer, and others.
During the Industrial Revolution, for example, English capitalists exploited slaves (unfree workers) in the cotton zones of the American South, a peripheral region within a semiperipheral country, United States.
From a largely Weberian perspective, Fernando Henrique Cardoso described the main tenets of dependency theory as follows:
- There is a financial and technological penetration of the periphery and semi-periphery countries by the developed capitalist core countries.
- That produces an unbalanced economic structure within the peripheral societies and between them and the central countries.
- That leads to limitations upon self-sustained growth in the periphery.
- That helps the appearance of specific patterns of class relations.
- They require modifications in the role of the state to guarantee the functioning of the economy and the political articulation of a society, which contains, within itself, foci of inarticulateness and structural imbalance.
Dependency and world system theory propose that the poverty and backwardness of poor countries are caused by their peripheral position in the international division of labor. Since the capitalist world system evolved, the distinction between the central and the peripheral states has grown and diverged. In recognizing a tripartite pattern in the division of labor, world-systems analysis criticized dependency theory with its bimodal system of only cores and peripheries.
Immanuel Wallerstein
The best-known version of the world-systems approach was developed by Immanuel Wallerstein.
He also offered a longer definition:
In 1987, Wallerstein again defined it: