Immanuel Wallerstein (1930–2019) was a renowned American sociologist and historian, best known for his development of world-systems Analysis. Wallerstein’s academic work focused on the historical development of global capitalism, arguing that the modern world-system emerged in the 16th century and was characterized by a division between the core, periphery, and semi-periphery countries. His influential multi-volume work, The Modern World-System, redefined how scholars understood global history, economics, and political power, emphasizing that nations do not operate in isolation but are part of an interconnected system where wealth and power are unevenly distributed.