Heritable Constraints and the Regulatory Genome

Heritable personality traits are well‑established, but their mechanism has been mischaracterized. Protein‑coding genes cannot specify thresholds, sensitivities, or characteristic patterns of response, because these features arise from system‑level dynamics rather than molecular sequences. This paper locates heritable psychological variation in the regulatory genome, where non‑coding architecture shapes developmental trajectories by modulating timing, expression thresholds, and structural biases. These inherited constraints generate the curvature of an individual’s developmental manifold: a structured space of tendencies that influences how experience is registered and how patterns stabilize. Agency operates as a distinct layer. It is relational, temporally extended, and responsible for orientation within the inherited structure. This separation between curvature and orientation dissolves familiar oppositions—nature versus nurture, determinism versus freedom, biology versus meaning—by showing that inherited constraints shape the landscape of possibility while agency determines the path taken within it. The result is a unified account of heritable traits and emergent agency that is biologically grounded, philosophically coherent, and free of genetic determinism.