1. Marxist and neo-Marxist international relations theories view the international system through a Marxist lens, emphasizing the centrality of economic factors and class struggle.
2. Key thinkers include Lenin, who analyzed imperialism as the highest stage of capitalism, and Gramsci, who developed the concept of cultural and ideological hegemony.
3. More recent theorists like Wallerstein propose a world-systems analysis, seeing the global economy as a single capitalist world-system with core, semi-periphery, and periphery states.