Theories of Development

By the end of this lesson, students will be able to (per CED LO SPS-7.E and Skill 1.E):

• Explain different theories of economic and social development (per LO SPS-7.E).
• Describe Rostow's Stages of Economic Growth and identify each of the five stages (per EK SPS-7.E.1).
• Explain Wallerstein's World System Theory, including the core, semiperiphery, and periphery (per EK SPS-7.E.1).
• Explain dependency theory and contrast it with Rostow's modernization view (per EK SPS-7.E.1).
• Define commodity dependence and explain how it relates to the resource curse and Dutch disease (per EK SPS-7.E.1).
• Apply Skill 1.E: explain the strengths, weaknesses, and limitations of each of the four theories in a specified country context.

Per EK SPS-7.E.1, "different theories, such as Rostow's Stages of Economic Growth, Wallerstein's World System Theory, dependency theory, and commodity dependence, help explain spatial variations in development." Skill 1.E requires students to go beyond description and evaluate each theory: what does it capture, what does it miss, and where does it break down? No single theory explains every case; the four together provide complementary lenses.

Two families of theory

The four theories fall into two broad families that answer different questions:

• Modernization theory (Rostow): internal-factors view — every country can develop by following the same stages the West followed. Poverty is a stage.
• Structuralist theory (Wallerstein, dependency, commodity dependence): external-factors view — global economic structure and historical trade relationships lock some countries into subordinate positions. Poverty is a result.

A linear, modernization model: every country passes through the same five stages on a path originally walked by Britain and the United States.

The five stages in detail

Strengths and limitations (Skill 1.E)

• Strength — Intuitive benchmarking: provides a clear sequence that students, policy makers, and international agencies can use to classify where a country is and what it needs next.
• Limitation — Eurocentric: assumes every country can and should follow the path of Britain and the United States. Ignores alternative development paths (East Asian developmental state, Nordic social democracy).
• Limitation — Ignores colonial history: treats each country as an isolated unit. A country that was systematically extracted from for three centuries is not starting from the same position as an uncolonized one.
• Limitation — Assumes unlimited resources: if every country reaches high mass consumption at United States levels, the planet cannot supply the material throughput required.
• Limitation — Ignores power asymmetry: does not explain why some countries remain stuck at earlier stages despite decades of aid.

The three positions

Strengths and limitations (Skill 1.E)

• Strength — Captures global inequality + interdependence: shows that core wealth is structurally linked to periphery poverty, not merely coincident with it.
• Strength — Semiperiphery category: accommodates upwardly mobile countries that resist a strict rich/poor binary.
• Limitation — Categories can be rigid: where exactly is the core/semiperiphery line? Is China core or semiperiphery in 2026?
• Limitation — Mobility is possible: Singapore and South Korea clearly moved from periphery toward core over a few decades, which a purely structural theory has difficulty explaining.
• Limitation — Ignores within-country variation: Brazil contains both core-like Sao Paulo and periphery-like rural Amazonia. The country-level unit of analysis masks internal differences.

The central claim

Where Rostow sees poor countries as pre-developed, dependency theorists see them as actively underdeveloped. Frank famously argued that "development and underdevelopment are two sides of the same coin." A periphery country that tries to industrialize faces foreign creditors who set interest rates, foreign-owned firms that set transfer prices, and export markets whose prices are set on exchanges in London, New York, or Chicago. Escape is not simply a matter of internal reform.

Strengths and limitations (Skill 1.E)

• Strength — Explains persistent poverty despite aid: countries can receive billions in foreign assistance yet remain poor if the underlying trade and debt relationships extract more than they deliver.
• Strength — Foregrounds colonial legacy: unlike Rostow, dependency theory takes seriously the four-century head start of extraction and boundary-drawing.
• Limitation — Does not explain the Asian Tigers: South Korea, Taiwan, Singapore, and Hong Kong escaped periphery status through export-oriented industrialization, exactly the integration that dependency theory warned against.
• Limitation — Underplays domestic governance: corruption, rule-of-law weakness, and poor macroeconomic management are sometimes more decisive than external pressure.
• Limitation — Policy prescriptions mixed: import-substitution industrialization, which dependency theory often informed, produced disappointing results in many Latin American countries in the 1970s and 1980s.

How it plays out

• Oil dependence — Venezuela: roughly 95 percent of export earnings from oil. When global prices crashed in 2014, the economy, currency, and political system collapsed together.
• Copper dependence — Zambia: copper accounts for about 70 percent of export earnings. Every commodity-price swing is a national budget shock.
• Cocoa dependence — Ghana: cocoa remains a dominant export. Weather, disease, and global chocolate demand determine national revenue.

Strengths and limitations (Skill 1.E)

• Strength — Predicts boom-bust volatility: commodity-dependent economies reliably exhibit the price-cycle symptoms the theory describes.
• Strength — Policy-relevant: points to concrete mitigation measures (sovereign wealth funds, export diversification, countercyclical fiscal rules).
• Limitation — Norway exception: Norway is deeply oil-dependent yet has avoided the resource curse through its sovereign wealth fund and strong institutions.
• Limitation — Botswana exception: diamond-dependent Botswana has posted decades of stable growth thanks to competent governance and transparent revenue management.
• Limitation — Causation not automatic: commodity dependence raises risk, but governance and institutions determine whether the risk becomes crisis.

Skill 1.E asks students to explain the strengths, weaknesses, and limitations of different models and theories in a specified context. The matrix below lays the four theories side by side.

Which theory fits which country

Applying Skill 1.E: no theory explains every case. Rostow best fits success cases where internal reform drove growth (South Korea from the 1960s, though with heavy state industrial policy Rostow did not emphasize). Wallerstein best fits the aggregate pattern of global wealth concentration. Dependency theory best fits Latin American countries that saw growth stall in the 1970s and 1980s. Commodity dependence best fits resource-exporting economies like Venezuela, Zambia, and Angola where a single commodity drives national fortunes.

Four cases where one theory is particularly illuminating.

South Korea · Rostow Success Story (with a twist)

GDP per capita: ~US$33,000 · 1960 level: ~US$150

South Korea moved from traditional agriculture to high mass consumption within two generations, the textbook Rostow trajectory. The twist: it was not the free-market path Rostow emphasized. The state directed credit, picked winners (Hyundai, Samsung), and sheltered them behind tariffs. Wallerstein's world-system theory captures what Rostow misses: South Korea uplifted from periphery to semiperiphery and now core through deliberate structural policy, not just natural-stage progression.

Country page →

Zambia · Classic Commodity Dependence

Copper ~70% of exports · Population: 21M

Zambia is the archetypal commodity-dependent economy. Copper makes up around 70 percent of export earnings; national budget swings follow global copper prices. When prices fell sharply in 2015 and again in 2020, Zambia defaulted on external debt. The resource curse is visible: despite four decades of mining revenue, average incomes have risen only modestly. Illustrates both commodity-dependence theory and Wallerstein periphery position.

Country page →

Brazil · Dependency Theory's Birthplace

Semiperiphery · Cardoso later elected president

Brazil was the context from which dependency theory emerged, and Fernando Henrique Cardoso, one of the theory's key authors, later served as Brazil's president (1995-2002). Brazil shows mixed evidence: it has advanced to Wallerstein's semiperiphery, hosts advanced aerospace (Embraer) and agribusiness sectors, yet remains vulnerable to commodity-price cycles (soy, iron ore) and periodic debt crises. Each of the four theories illuminates a different facet of Brazil's trajectory.

Country page →

United States · World-System Core

GDP per capita: ~US$83,000 · Reserve currency

The United States occupies the core position in Wallerstein's world-system. Capital-intensive production, dominant services and research and development, the world's reserve currency, and the deepest financial markets all concentrate there. Rostow's model fits the United States historical path (it was the implicit template), but the structural features Wallerstein emphasizes (core extraction of surplus from periphery) are clearest at the top of the system. Apply Skill 1.E: no theory contradicts the United States core status, though each frames it differently.

Country page →

1. Apply Skill 1.E to compare Rostow and Wallerstein. Identify one strength of each and one limitation of each. Which theory better explains South Korea's rapid rise from 1960 to 2020? Justify.
2. Apply Skill 1.E to compare dependency theory and commodity dependence. How do they overlap? How do they differ in scope and mechanism? Which better explains Venezuela's collapse after 2014?
3. Rostow implicitly assumed that every country can reach "high mass consumption." If every country did so at United States per-capita resource use, what planetary constraints would be violated? What does this imply for the theory's validity?
4. Norway and Botswana are both heavily resource-dependent yet have avoided the resource curse. What factors explain the exceptions? What does this teach about the limitations of commodity-dependence theory?
5. Wallerstein's world-system uses the country as its unit of analysis. Pick one semiperiphery country (Brazil, Mexico, or South Africa). Identify regions within the country that are core-like and regions that are periphery-like. What does the within-country pattern reveal about the theory's limitations?

Draft alignment — pending educator review. AP HG codes correspond to the official College Board Course and Exam Description (Effective Fall 2020, V.1). Statements below are paraphrased in CountryReports' own voice; refer to the College Board's published CED for verbatim wording.

AP® and Advanced Placement® are registered trademarks of the College Board. The College Board was not involved in the production of this material and does not endorse it. Standards statements above are paraphrased; codes refer back to the official College Board CED, the NCSS C3 Framework, the Common Core State Standards, and other cited frameworks.