Curved Propagation vs. Curved Space

We examine the origin of relativistic kinematics by separating physical propagation from geometric interpretation. We show that Maxwell's equations, forced by continuity and divergence-free energy transport, already imply hyperbolic kinematics and Lorentz-type transformations. No curvature of space or fusion of space and time is required. Einstein's geometric interpretation reproduces the mathematics but misidentifies its cause. The observed phenomena are consequences of curved propagation paths and finite transport rates of electromagnetic energy, not properties of space itself.