The Three Principles of Happiness（Ethics of Happiness）

Contemporary normative sciences—from ethics to political science, from jurisprudence to economics—have long faced a crisis of "missing axioms": each field possesses numerous "mid-level theories" but lacks a set of concise, self-evident, derivable "axioms" to serve as a logical starting point. This study takes "eudaimonia" as the meta-value and the "Stratified Theory of Eudaimonia" as the descriptive model of behavioral motivation, rigorously deriving three propositions that can serve as axioms: the First Principle—pursue one's own eudaimonia (establishing the end), the Second Principle—do not infringe upon the eudaimonia of others (setting the boundary), and the Third Principle—co-construct an environment conducive to eudaimonia (indicating the path). These three principles constitute a logically coherent, progressively structured system. This study operationalizes core normative concepts into computable f-w-e parameters (moral sentiment, social deterrence, cooperation dividend) through a game-theoretic model, demonstrating that cooperation can become a stable equilibrium within an expanded framework of rationality. Through case diagnoses—including the collapse of the Qin Dynasty, the dilemmas of the marriage institution, and the dissipation of wealth—it validates the explanatory power of the stepwise failure of the Three Principles. Through systematic reconstructions of political philosophy, jurisprudence, education, and economics, it demonstrates the potential of the Three Principles as a cross-disciplinary meta- framework. The core positioning of this book is this: The Three Principles of Eudaimonia constitute the underlying operating system from individuals to civilizations—they are both a guide for individual 2 action in the pursuit of eudaimonia and the underlying logic of social cooperation and institutional design. The Three Principles of Eudaimonia mark a paradigm shift in which humanity moves from passive evolution to self-design. From individuals to civilizations, this work systematically elaborates the theoretical construction, empirical validation, and future applications of this underlying operating system, To provide a unified framework for scientific research