# Summary This book begins from one ontological claim only: interaction implies a shared substrate. That substrate is identified here as energy. Physics is therefore not built from separate primitive substances called matter, charge, force, and spacetime, but from ordered registrations of energy and the question of how one registration becomes another without primitive creation or annihilation. The flow of energy allowing its reconfiguration is the central object of the book. In the source-free case, a region changes only by what crosses its boundary. The resulting transport is therefore continuous and divergence-free. Once that condition is imposed, local reorganization must preserve the same flow rather than replace it by a new one. The book argues that this is exactly what curl does, and that closing the same reorganization on the same field gives double-curl transport. This double-curl closure reduces to the wave equation. In this sense, the source-free Maxwell transport is recovered as the way energy reorganizes and trasports. Once the same flow is required to close on itself, discreteness appears. When flow closes on itself, standing waves on that closure admit only integer windings and therefore only discrete modes. The book then reads the hydrogen spectrum as evidence that matter can be understood as stationary standing organization of energy flow, with the observed spectral pattern arising from reorganizations between allowed closures (windings) rather than from an independent particle ontology. The Schrodinger equation is recovered as a narrow-band approximation of a standing wave of energy flow. The quantum sector is therefore not introduced by new postulates but as an approximation of self-bounded energy flow, a change of regime within the same transport picture. Self-refracting flow can close on itself. When it does, the simplest topologically self-sustaining shape is toroidal — a sphere with a through-hole sustains continuous nowhere-vanishing tangential flow in two independent directions, while a plain sphere does not. More complex closures — trefoils and other knotted configurations — are also admitted by the same dynamics, but the torus is the primitive case. A torus carries exactly two independent non-contractible cycles. The flow winding around each cycle is an integer, so the toroidal mode is characterized by a winding pair $(m, n)$. These integers are topologically rigid under source-free evolution: smooth dynamics cannot change an integer winding without a phase slip, and source-free Maxwell dynamics forbids phase slips. The two conserved winding numbers are recovered as charge and spin. Neither is a separately postulated quantity; both emerge from the topology of the simplest self-sustaining closure. The through-hole flux of the toroidal mode — the oriented projection of the winding through the aperture — extends outward into the non-simply-connected exterior. Because $\nabla\cdot\mathbf{G} = 0$ everywhere, this flux is distributed over shells of increasing area and therefore falls as $1/r^2$. This is the source-free account of the inverse-square field attributed to a charged body: no primitive source is required, only a topologically non-trivial closure. The same picture gives mechanics in effective form. Energy flow carries momentum, and force is the net momentum flux across the boundary of a localized region. Newton's law is thus not a separate primitive rule, but the integrated continuity law for momentum applied to a stable configuration. A late chapter then shows that if different observers preserve the same source-free transport law, the admissible re-description of motion takes Lorentz form. The book's kinematics is therefore recovered as a consequence of transport invariance, not as an independent spacetime postulate. Mass is not a property of a single toroidal mode but the aggregate scalar energy of many such modes, measured as $E/c^2$. The primary interaction between two simple toroidal closures is always through their axial charges — the directed through-hole fluxes of the two modes meeting across the exterior. Gravity, by contrast, is the interaction of large aggregates of toroids through their cumulative shell-distributed mass-energy. One aggregate creates an exterior organized load; another self-sustained flow refracts in response to that load. The weak-field account then recovers the standard inverse-square pull and light bending as consequences of transport through a nonuniform organized field, not as the action of a separate gravitational substance. The unifying claim of the book is not that mathematics is unnecessary, but that fewer primitive ontologies are necessary. One substrate, one continuity principle, one transport law, and one standing-wave logic are taken to be enough to recover the familiar structure of physics in progressively richer forms.