During the Mississippian period (A.D. 1000-1500) the southeastern United States witnessed a broadscale fluorescence of polities characterized by impressive earthwork construction, rich mortuary offerings, and intensified agriculture. Research on the nature of complexity in these so-called chiefdoms has been an enduring issue in North American archaeology, even as this research has undergone several paradigmatic shifts. This study focuses on the primary dimensions of the archaeological record used to describe and explain variation in Mississippian complexity – polity scale, settlement and landscape, the organization of labor, mortuary ritual and ideology, and tribute and feasting. Changing perspectives toward the organization of complexity and power have become increasingly pronounced in each of these categories.