Immanuel Wallerstein was an influential sociologist and historian best known for developing the world-systems theory, which examines the social dynamics of global capitalism. He proposed that the world is divided into core, semi-periphery, and periphery nations, highlighting the economic disparities and power imbalances inherent in the global system. His work emphasized the interconnectedness of countries and suggested that economic processes cannot be understood in isolation from their historical and political contexts. Wallerstein's theories gained prominence in the 1970s and 1980s, challenging traditional approaches in the social sciences. His ideas prompted scholars to rethink globalization and the relationships between nations, highlighting how historical legacies shape contemporary economic realities. He emphasized that understanding capitalism requires a perspective that accounts for its global implications, transcending national boundaries and focusing on the broader system. Throughout his career, Wallerstein contributed to various academic fields, advocating for interdisciplinary research. His extensive writings have inspired debates about social theory, political economy, and historical analysis. By linking social phenomena to larger global structures, he encouraged a comprehensive approach to understanding contemporary issues, influencing both academia and policy-making in significant ways. Immanuel Wallerstein was a prominent figure in sociology and history, recognized for his world-systems theory. This theory analyzes the global capitalist system, highlighting the economic relationships and power dynamics among nations, classified into core, semi-periphery, and periphery. His work shifted the focus of social sciences by emphasizing the need to consider historical context and global interconnections when studying economic phenomena. Wallerstein's ideas became influential during the 1970s and 1980s, as he challenged existing paradigms and prompted new ways of thinking about globalization. Wallerstein's legacy is marked by his interdisciplinary approach, encouraging the integration of different fields to understand complex social issues. His writings continue to inspire discussions on political economy and societal development, making a lasting impact on both academic thought and real-world policy considerations.