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Marxist IR scholars argue that imperialism and great-power conflict arise from capitalist competition for markets, resources, and investment opportunities. The structure of global capitalism, with its requirement for constant accumulation, drives states to expand and exploit peripheral regions. International hierarchy reflects capitalist relations of production.
Read Lenin's *Imperialism* alongside a case study of a specific empire (British India, Belgian Congo, US interventions in Latin America). Then read Wallerstein on world-systems and trace how a specific peripheral country's position in the world economy was shaped by its colonial incorporation. Compare the Marxist explanation to what a realist or liberal account would say about the same cases.
Your prerequisite in international political economy introduced the idea that the global economy's structure shapes political outcomes. Marxist IR theory takes this further: it argues that global capitalism is not merely one factor among many but the *fundamental* determinant of why states relate to each other as they do and why some states dominate others. Where realists see states competing for power and liberals see states cooperating through institutions, Marxists see states acting as instruments of capital accumulation — and international hierarchy as the expression of capitalist class relations at a global scale.
The foundational argument comes from Lenin's *Imperialism, the Highest Stage of Capitalism* (1917). Lenin observed that mature capitalist economies face a tendency toward surplus capital: profits accumulate faster than domestic investment opportunities can absorb them, driving down returns. The solution capitalists found was exporting capital to peripheral regions — where labor is cheap, resources are abundant, and local states offer weak resistance to exploitation. Banks, corporations, and home governments worked together to secure these investment conditions, using military force when necessary. Great-power competition in the early twentieth century (and, Lenin argued, World War I itself) was therefore explained not by miscalculation or security dilemmas but by inter-imperialist rivalry — capitalist states competing for access to the same peripheral markets and investment zones.
Wallerstein's world-systems theory reframes this geographically: the global economy is a single integrated system divided into a core (wealthy industrial states that extract value through manufactured goods, financial services, and technological rents), a periphery (regions that export raw materials and labor on unfavorable terms), and a semi-periphery (intermediate states that experience both dynamics). The critical move is the claim that underdevelopment is not a starting point — a pre-modern condition that development programs can remedy — but a *product* of how peripheral regions were incorporated into global capitalism. The Democratic Republic of Congo's poverty is not a remnant of pre-history; it was actively manufactured through Belgian colonial extraction, Cold War client-state relationships, and post-colonial structural adjustment programs that prioritized debt repayment over domestic investment.
The framework's analytical strength is explaining patterns that state-centric theories miss. Why do wealthy countries systematically intervene in poor countries to support authoritarian governments that suppress labor movements and protect foreign investors? Why does international financial architecture (IMF conditionality, debt restructuring) consistently impose austerity on peripheral populations while protecting core-country creditors? These patterns are puzzling if you assume states pursue national security or even national economic interest broadly; they become predictable if states are understood as vehicles for class interests embedded in capitalist accumulation. The framework's limitation is a tendency toward structural determinism — treating capital as an agent with its own logic and history as the unfolding of that logic — which can underestimate genuine political agency, ideological contestation, and the contingent outcomes of specific historical struggles. The most sophisticated contemporary Marxist IR work combines structural analysis with attention to the political processes through which capitalist interests are (incompletely, contestably) translated into state policy.
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