This paper introduces Registration Regime Theory (RRT) as a foundational framework that reinterprets human history through the architecture of inscription and record continuity. Moving beyond conventional political explanations, the study argues that what is continuously registered rather than merely experienced constitutes the ontological base of social and political power. Across historical epochs—from embodied mnemonic practices to written archives and contemporary algorithmic systems—the paper explores how systems of registration shape identity, obligation, property, and governance. It further theorizes registration fracture as a condition of ontological erasure, leading to legal nonexistence and conflict. The extension of RRT into digital regimes suggests that algorithmic registration transforms memory into prediction, and identities into data profiles.