This paper proposes the Three-Tier OS, a structural model in which the three tiers of thought (individual), action (organization), and institution (society) do not exist independently, but are constituted as a connective structure through mutual mapping, recursive feedback, and alignment. Existing sociological hierarchical analyses and multi-level approaches have tended to observe each tier independently and to connect them through post-hoc causal accounts. In contrast, this model describes the recursive connective relationship in which higher tiers are formed by mapping the structures of lower tiers, and in which societal tiers feed back into individual tiers, thereby generating an inter-tier circulation structure—articulated as a minimal structural principle. This model does not address the internal structure of cognition (the domain of Thought Engineering) or the methodology of structural observation (the domain of Structural Engineering). By restricting its scope to the minimum principles that connect these domains, the model provides a foundation for analytical frameworks that examine the structural isomorphism between cognitive and institutional domains. This model can also be interpreted as a minimal bridging structure that is compatible with recursive structural frameworks such as the Layered Recursive Structure Model (LRSM).
Hiromi Shimamoto (Fri,) studied this question.