AbstractThis paper presents the Unified Relativistic Theory of Gravity (URTG), a novelframework that extends and unifies Special and General Relativity. URTG posits thatspace, time, mass and motion are relative and inter-causal properties emerging frominteractions. The theory introduces the concept of a frame-independent unified field anda speed of causality, redefining our understanding of light, gravity, and spacetimegeometry. URTG treats scalar, inertial, and tensor fields as mathematical descriptions ofemergent effects rather than fundamental ontological entities, aligning with aprocess-based ontology. The framework incorporates a causal structure tensor andcosmic inertia field, offering new insights into the nature of mass, energy, andelectromagnetic interactions. Key equations, including the UnifiedMass-Energy-Geometry-Light Relationship and the Causality Emergence Equation,demonstrate how URTG integrates various physical phenomena within a single,comprehensive model. By reinterpreting concepts such as light's momentum andmass-energy equivalence, URTG provides a fresh perspective on fundamental physics.This theory offers potential resolutions to long-standing issues in physics and opensnew avenues for exploring the universe's underlying structure and behavior.