Modernization ideas remain useful when they are framed as testable relationships rather than a ranking of cultures. Researchers can ask whether reliable electricity supports industrial growth, whether schooling changes fertility, or whether urbanization alters family and occupational life. No single sequence is guaranteed. States, communities, businesses, and social movements can combine modern institutions in different ways.

Dependency theory argues that poverty in less powerful countries cannot be explained only by internal traditions or shortages. It examines how colonial ties, export dependence, foreign ownership, debt, and unequal trade can transfer resources toward wealthier countries and limit local choices. Development and underdevelopment may therefore be connected outcomes.

Dependency is not the same as any international exchange. Buying machinery abroad can raise productivity. Foreign investment can create jobs, tax revenue, and new skills. The dependency question asks who controls the investment, where profits go, which local industries grow or disappear, and whether the receiving country gains bargaining power or becomes tied to one buyer, lender, or export.

World-systems theory, associated with Immanuel Wallerstein, examines a capitalist world economy divided into changing positions. Core areas tend to control high-profit production, finance, technology, and political influence. Peripheral areas are more likely to supply raw materials or low-wage labor under weaker bargaining conditions. The semiperiphery occupies an intermediate position and can exploit peripheral labor while facing pressure from core firms and states.

These are relational positions, not permanent labels or measures of cultural worth. A country can move, and different industries within one country can occupy different positions. A nation may export advanced software while relying on low-wage garment production and imported machinery. World-systems analysis follows the chain and the distribution of profit rather than assigning one identity to the entire country.

Quick review: Modernization follows internal institutional transformation. Dependency follows constraints created through unequal external relationships. World-systems analysis maps changing positions in a single world economy. Compare mechanisms before choosing a label.

Watch the lesson connection

Theories of Global Stratification gives you a second explanation of the ideas surrounding this lesson. As you watch, pause when the lesson concept appears and explain how the example fits.

Try the idea yourself

Write one original example, one close nonexample, and one observation that would help you tell them apart. That small exercise turns a definition into a sociological tool you can use in daily life.