Abstract Human civilization can be understood as a large-scale network of interconnected decision systems operating within the constraints of natural laws. This paper proposes a conceptual framework called the Universal Decision System, which models human societies as dynamic networks composed of individuals, institutions, and information flows. The framework integrates principles from Systems Science, Network Science, Cybernetics, and Complex Systems. The proposed model argues that system stability depends on three key conditions: balanced interactions, accurate information, and defect-free system components. When defects accumulate or balance is violated, instability emerges in the form of social conflict, institutional failure, economic crises, or ecological collapse. The paper formalizes these ideas through a mathematical representation called the Grand Equation of the Universal Decision System and presents a network-based interpretation of civilization as a collective decision process embedded within the natural environment.