---
slug: convergence-encyclopedia-c07
title: Convergence Encyclopedia: C07 — Feedback / Cybernetics / Homeostasis
canonical: https://miscsubjects.com/a/convergence-encyclopedia-c07
---

**F1 — Tier.** T1 (engineering and physiological feedback); T2 (extension to social systems — contested).

**F2 — Sources.** 
- Wiener, N. (1948). Cybernetics: Or Control and Communication in the Animal and the Machine. MIT Press.
- Ashby, W.R. (1956). An Introduction to Cybernetics. Chapman & Hall.
- Ashby, W.R. (1960). Design for a Brain: The Origin of Adaptive Behaviour. 2nd ed. Wiley.
- Cannon, W.B. (1926). “Physiological regulation of normal states: some tentative postulates concerning biological homeostatics.” Pari (Paris: Medecine), and expanded in Cannon (1932) The Wisdom of the Body. W.W. Norton.
- Classical control theory: Maxwell, J.C. (1868). “On governors.” Proceedings of the Royal Society, 16, 270–283.

**F3 — Domains.** Physiology (glucose regulation, body temperature), engineering (control systems, autopilots), ecology (predator-prey cycles, carrying capacity), economics (market corrections, fiscal policy).

**F4 — Scale.** Molecular feedback (gene regulation, ~10⁻⁸ m) → planetary homeostasis (Gaia hypothesis, ~10⁷ m — T2/T3).

**F5 — Falsifier.** A stable adaptive system that maintains its target variables within bounds with no feedback mechanism — no sensor, no comparator, no actuator. Such a system would demonstrate that apparent stability can exist without feedback control.

**F6 — Rival (strongest form).** Apparent stability is passive equilibrium, not active feedback. Many systems that look like homeostasis are simply buffers — large reservoirs that damp fluctuations without active regulation. The “feedback” description is a theoretical overlay; the actual mechanism is mass action, diffusion, or other passive processes. Feedback is a useful model, not always a real mechanism. (Criticism of strong Gaia: Doolittle 2019 Science 366:eaaw0410.)

**F7 — Independence.** MODERATE — with flags. Wiener (mathematics/engineering, MIT), Cannon (physiology, Harvard), and Ashby (psychiatry, Burden Neurological Institute/Bristol) developed feedback concepts independently from different disciplinary starting points. BUT: Wiener and Ashby met at the Macy Conferences; Ashby’s Introduction to Cybernetics (1956) explicitly builds on Wiener’s framework. Cannon’s homeostasis (1926, 1932) predates and was independent of Wiener (1948). Independence: HIGH for Cannon; MODERATE for Wiener-Ashby due to Macy Conference connection.

**F8 — Pattern type.** Biological / structural.

**F9 — Maps.** A12 (self-reference), A3 (pattern-dynamics).

---

## Corpus map
- Previous: [Convergence Encyclopedia: C06](/a/convergence-encyclopedia-c06)
- Next: [Convergence Encyclopedia: C08](/a/convergence-encyclopedia-c08)
- Encyclopedia start: [The Schema](/a/convergence-encyclopedia-schema)
- Same node, other planes: [Catalogue node C07](/a/oip-c07-feedback-cybernetics) · [Catalogue hub](/a/oip-convergence-public-article)
- Edges touching C07: [convergence edge 6](/a/oip-convergence-edge-6)
- Kin corpora: [Total Structure](/a/oip-total-structure) · [Signature of the Grain](/a/oip-sog-preamble-axioms)
