Wallerstein's World System and Dependency Theory

Immanuel Wallerstein split the global economy into three zones. Core countries, like the United States, Germany, and Japan, have advanced technology, skilled labor, strong institutions, and they control finance and high-profit manufacturing. Periphery countries, often former colonies in Africa, South Asia, and Latin America, supply raw materials and cheap labor, with weak infrastructure and little control over prices. Semiperiphery countries, like Brazil, India, or Mexico, sit between the two: they exploit periphery countries somewhat while being exploited by the core. This isn't three separate economies. It's one system, and each zone's position depends on the others.

Trace a commodity chain and the mechanism becomes obvious. A periphery farmer sells raw cocoa for pennies a pound. A core-based company processes it, brands it, packages it as a chocolate bar, and sells it for many times the original price. The farmer's country got a small one-time payment; the core company captured the processing profit, the brand value, and the retail markup, year after year. That gap isn't an accident of hard work or laziness. It's built into who controls which stage of production.

This is why dependency theory rejects Rostow's ladder. Rostow imagined every country climbing the same five stages independently, with enough investment and the right conditions. Wallerstein and dependency theorists answer that development is relational: the core got rich partly by keeping the periphery poor, extracting its resources and labor cheaply and selling finished goods back at high prices. A country can still move up, from periphery into semiperiphery, usually by industrializing and diversifying its exports, but climbing doesn't dismantle the system itself. Someone is still left at the bottom supplying the cheap inputs.