CONCEPT
Holon
Koestler's term for an entity that is simultaneously a self-contained whole and a part of a larger whole—the structural unit of hierarchical organization in biological, cognitive, and computational systems.
The holon is Koestler's fundamental unit of hierarchical organization: an entity that operates simultaneously as an autonomous whole and as a component of a larger system. A cell is a holon—a self-contained living unit that is also a part of the tissue. A word is a holon—a self-contained unit of meaning that is also a part of the sentence. A mind is a holon—a self-contained cognitive system that is also a node in the network of culture. Every holon exhibits two complementary tendencies: the self-assertive tendency to maintain its own identity and autonomy, and the participatory tendency to integrate into the larger system. Creative tension between these tendencies is, in Koestler's framework, the engine of both stability and novelty in hierarchical systems.
In The You On AI Field Guide
Koestler introduced the holon in The Ghost in the Machine (1967) as an alternative to reductionist and holistic framings of biological and cognitive organization. Reductionism treats the part as primary, the whole as derivative; holism treats the whole