World Systems Theory is a sociological perspective that explains the dynamics of global inequality and economic development. It was developed by sociologist Immanuel Wallerstein in the 1970s. The theory divides the world into three main categories: the core, semi-periphery, and periphery. Core countries are economically advanced and exploit resources from peripheral countries, which are less developed and often dependent on core nations. This framework highlights how economic and political relationships shape global interactions. It emphasizes that local events are influenced by global processes, suggesting that understanding world systems is essential for addressing issues like poverty and inequality.