The Relativistic Scalar-Vector Plenum (RSVP) proposes a theoretical framework in which spacetime geometry and physical laws are not fundamental givens but emergent consequences of deeper processes. Instead of assuming a pre-existing geometric arena, the model describes reality as a substrate of three coupled fields whose behavior is governed by irreversible entropy flow and the relaxation of physical constraints. Familiar regimes such as classical mechanics, relativity, and gravity are reinterpreted as effective descriptions that arise when this underlying thermodynamic microhistory is coarse-grained, stabilized, or observed at large scales. Within this framework, time is not treated as a coordinate embedded in spacetime but as a measure of irreversible change itself. Gravity is no longer a primitive geometric curvature but emerges from the tendency of entropy to reorganize constraint structure within the plenum. The result is a reorganization of physics in which geometric primitives are replaced by more fundamental processes of dissipation, transport, and constraint relaxation, shifting the explanatory foundation from static structure to dynamic thermodynamic evolution.