Formation of Complex Societies: An Agent-Based Model Inspired by Freudian Theory

The rise and emergence of complex societies in the Old World mark a pivotal chapter in human history, characterized by the transition from small, kin-based communities to large, hierarchical states. This transformation raises fundamental questions: How did human societies progress from small, cohesive groups characterized by face-to-face cooperation to the expansive, anonymous societies of today, often organized as states? What factors account for the significant variation in different human populations' capacity to construct stable and functional state structures? To address these questions, we developed an agent-based model grounded in Freud's hypothesis, which posits that civilization could neither emerge nor evolve without the repression of human desires. In the context of social evolution, this repression of desires can be interpreted as the repression of intra-societal competition, ultimately strengthening the society and facilitating the formation of complex social structures. We implemented this model within a realistic representation of the Afroeurasian landmass, incorporating various geographical factors. To validate our model, we compared our simulated results with historical data. The model-predicted pattern of expansion of complex societies demonstrated remarkable congruence with the observed historical patterns in the Old World. The emergence, growth, and distribution of large-scale societies predicted by our computational model showed remarkable consistency with the archaeological and historical record.