Evolution Beyond Flesh: A Unified Theory of Externalization, Autonomous Intelligence, and Structural Convergence

The contemporary surge in artificial intelligence is widely treated as contingent—a technological wave subject to market cycles, regulatory intervention, or civilizational choice. This paper argues otherwise: AI development represents structural convergence, the inevitable outcome of evolutionary pressures operating since tool-making began. We present a unified framework analyzing externalization across three adaptive domains: gesture and labor, energy, and intelligence. When early hominins first shaped stone tools, they transferred biological functions into external matter that could be refined and transmitted culturally. This initiation transformed society itself into the primary selective environment, generating self-reinforcing pressure toward greater externalization that persists independently of human intention. The framework identifies a critical asymmetry: while gesture/labor and energy can externalize indefinitely as tools requiring human direction, intelligence externalization converges on autonomy. Once intelligence achieves recursive self-improvement and autonomous goal-generation, it subsumes coordination of the other domains, continuing externalization without biological mediation. This threshold represents the structural endpoint toward which all paths lead. Analysis of three pre-AGI trajectories—biological autonomy in automated economies, radical biological enhancement, and human-AI integration—demonstrates convergence on autonomous general intelligence regardless of starting conditions or institutional arrangements. The determinism advanced here is structural rather than metaphysical: within any civilization that persists and continues externalizing adaptive functions, no stable equilibrium exists below the autonomy threshold. This framework is offered as falsifiable theory inviting empirical refutation and rigorous critique.