We present a unified framework in which the core structures of modern physics emerge froma single underlying mechanism: irreversible constraint formation (“observation”) acting on aninitially unstructured space of possibility. The theory is specified by a master pruning operatorthat suppresses histories accumulating high constraint density and by a local constraint fieldwhose growth is sourced by field intensity and smoothed by diffusion. Within this setting weshow: (1) the Born rule emerges dynamically as the normalized long-time survival measureof branch components under coherence-dependent pruning, rather than as an independentaxiom; (2) gravity arises as an effective description of gradients in accumulated constraintdensity, reproducing the Newtonian limit and admitting a generally covariant formulation closelyparalleling Einstein’s field equations; and (3) the Standard Model is naturally interpreted asa low-energy universality class reached after successive pruning and ordering transitions, withgauge symmetry as emergent redundancy of persistent constraint-defect sectors, chirality andanomaly freedom as pruning-consistency conditions, and electroweak symmetry breaking as aconstraint-induced ordering phenomenon whose effective order parameter reproduces Higgs-sectorphenomenology. We summarize numerical evidence from dissipative lattice simulations showingrobust self-organization into stable topological defects across multiple resolutions and outlinediscriminating predictions and falsifiers. The framework requires no substrate beyond constrainedpossibility itself; quantum probabilities, spacetime geometry, and particle interactions appear asregime-dependent summaries of the same constraint-driven dynamics