String Theory Derivation in a Maxwell Universe

We show how linear, classical Maxwell theory admits toroidally organized energy flow whose closed trajectories are labeled by integer winding numbers. Localized electromagnetic energy flow defines an effective one-dimensional object with tension and inertia computed directly from field densities. Stability against dispersion arises because high electromagnetic energy density reduces the local effective speed of light, producing self-trapping through emergent refraction. Explicit null Maxwell solutions with torus-knot topology demonstrate that integer data $(m,n)$ are computable from conserved field integrals. String-theoretic structures thus emerge as effective descriptions of self-stabilizing electromagnetic topology.