World-systems theory is a multidisciplinary, macro-scale approach to world history and social change which emphasizes the world-system as the primary (but not exclusive) unit of social analysis. “World-system” refers to the inter-regional and transnational division of labor, which divides the world into core countries, semi-periphery countries, and the periphery countries. Though intrinsically geographical, world-systems perspectives did not receive geographers’ attention until the 1980s, mostly in economic and political geography. Nevertheless, geographers have made important contributions in shaping world-systems perspectives through theoretical development and critique, particularly in the understanding of urban processes, states, and geopolitics. The world-systems theory can be considered as a sub-discipline of the study of political geography. Although sharing many of the theories, methods, and interests as human geography, political geography has a particular interest in territory, the state, power, and boundaries (including borders), across a range of scales from the body to the planet. Political geography has extended the scope of traditional political science approaches by acknowledging that the exercise of power is not restricted to states and bureaucracies, but is part of everyday life. This has resulted in the concerns of political geography increasingly overlapping with those of other sub-disciplines such as economic geography, and, particularly, with those of social and cultural geography in relation to the study of the politics of place.