A Unified Structural Theory of Behaviour Under Constraint: Architecture, Agency, and Non‑Inevitable Futures

This work presents a unified structural theory explaining behaviour in humans, institutions, and formal systems through a single architectural mechanism. It integrates three components: a general five‑state loop that governs behaviour under contradictory requirements, a formal theorem demonstrating that deterministic constraints define the possibility space but not a single inevitable future, and an agent‑agnostic model showing that behavioural loops arise from structural contradictions rather than personal inadequacy. The theory shows that systems of any kind—individual, organisational, or computational—express predictable patterns when requirements, blocks, and branching conditions interact. This publication extends and supplements the author’s earlier work on the Structural Loop Phenomenon by providing the overarching mathematical and conceptual framework that unifies these behaviours across domains.