Why did social complexity often lead to the centralization of power?

Social complexity often leads to the centralization of power because as societies grow and become more intricate, they require more organized structures to manage resources, maintain order, and address the needs of diverse populations. Centralized authority can streamline decision-making, enforce laws, and coordinate large-scale projects, which are essential for managing the complexities of urbanization, trade, and social stratification. Additionally, a centralized power can better respond to external threats and internal conflicts, reinforcing its legitimacy and control over the populace.