A Thermodynamics-Based Conceptual Framework for Lifespan Entropy Convergence and Boundary-Induced Identity Formation

Traditional paradigms in physical science and human psychology have historically operated in domain isolation:physics models thermodynamic entropy within inanimate or cosmic systems, whereas human psychology treatsidentity and developmental trajectories as purely qualitative constructs. This paper proposes a unified,interdisciplinary framework that models the human organism as an open, non-equilibrium dissipative systemgoverned by non-equilibrium thermodynamics and biological boundary dynamics. We formalize identity formationthrough the biophysical principles of membrane selectivity, defining psychological ego-boundaries via permeablestate equations. Furthermore, we formulate a lifespan entropy trajectory model wherein early childhood represents astate of thermodynamic deficit—relying on parental and environmental low-entropy subsidies—which is subsequently offset by adult low-entropy restitution, driving the lifetime net entropy generation rate toward a zero-sum convergence over the complete temporal lifespan. Finally, we establish the phase space of boundary dynamics, identifying the critical "Creative Chaos" regime situated between pathological rigidity and catastrophic boundarydissolution. This framework offers an integrative paradigm bridging natural laws with human narratives.