This article will discuss the ongoing development of a Marxist theory of international relations. Examining the work of Hannes Lacher and that of the contributors toMarxism and World Politicsreveals an overarching concern amongst this group of scholars to engage with the central concerns of the discipline of International Relations – the nature of the state, anarchy, and war. Their analysis provides an excellent starting point for the development of a Marxist approach to international relations.