Contribution of Socionics to the Scalability of Complex Social Systems: Introduction -- Contribution of Socionics to the Scalability of Complex Social Systems: Introduction -- I Multi-layer Modelling -- From "Clean" Mechanisms to "Dirty" Models: Methodological Perspectives of an Up-Scaling of Actor Constellations -- Sociological Foundation of the Holonic Approach Using Habitus-Field-Theory to Improve Multiagent Systems -- Linking Micro and Macro Description of Scalable Social Systems Using Reference Nets -- II Concepts for Organization and Self-Organization -- Building Scalable Virtual Communities - Infrastructure Requirements and Computational Costs -- Organization: The Central Concept for Qualitative and Quantitative Scalability -- Agents Enacting Social Roles. Balancing Formal Structure and Practical Rationality in MAS Design -- Scalability, Scaling Processes, and the Management of Complexity. A System Theoretical Approach -- III The Emergence of Social Structures -- On the Organisation of Agent Experience: Scaling Up Social Cognition -- Trust and the Economy of Symbolic Goods: A Contribution to the Scalability of Open Multi-agent Systems -- Coordination in Scaling Actor Constellations -- From Conditional Commitments to Generalized Media: On Means of Coordination Between Self-Governed Entities -- IV From an Agent-Centred to a Communication-Centred Perspective -- Scalability and the Social Dynamics of Communication. On Comparing Social Network Analysis and Communication-Oriented Modelling as Models of Communication Networks -- Multiagent Systems Without Agents - Mirror-Holons for the Compilation and Enactment of Communication Structures -- Communication Systems: A Unified Model of Socially Intelligent Systems.