This paper explores the crucial role of ideology and worldview in the formation of early civilizations and the process of social complexity. It highlights the challenges in studying spiritual culture due to the lack of direct evidence in the archaeological record and the limitation of traditional archaeological methods in addressing ideological and belief systems. While early civilizations did not distinguish between natual, supernatual, and social realms, their belief systems were deeply interwined with political and social structures. Religion in early societies often served to legitimize the power of rulers, with ideological systems closely tied to rituals, ceremonial objects, and public monuments that helped reinforce social hierarchies. Through anthropological theories of religion, ethnographic analogies, and the analysis of material culture, the paper examines how early civilizations used ideology to consolidate power and organize their societies. The development of shamanistic cults into more complex religious systems reflects broader political and social changes, with rulers monopolizing rituals to control supernatual forces and reinforce their authority. The study also traces the transition from a unified worldview in the early stage of civilization to a more rational, separated understanding of the world during the “Axial Age”, which marked the beginning of modern societal structures. Ultimately, the paper argues that the idiology of early civilizations, embodied in material culture and religious practice, was a key driver of social complexity and political power.