# Twelve leverage points
## MicroSim spec
- **Recommended sim type:** stock-and-flow
- **Microsimmability score:** 70/100
- **Layout:** drawing region (canvas) on top; control region (sliders/buttons) below.
### Parameters (tunable controls)
- `Parameter strength`
- `Feedback gain`
- `Goal shift`
### What animates
A stock-and-flow model responds as you intervene at progressively deeper leverage points.
### Learning objective
Compare how interventions at different leverage points change system behavior.
## Links (Wikipedia order)
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[[Alexander_Bogdanov]] · [[Allenna_Leonard]] · [[Anatol_Rapoport]] · [[Anthony_Wilden]] · `Atmosphere` · [[Barbara_J._Grosz]] · [[Biological_system]] · [[Béla_H._Bánáthy]] · [[C._West_Churchman]] · `Center_of_gravity_(military)` · [[Charles_A._S._Hall]] · `Chelsea_Green_Publishing` · [[Claude_Shannon]] · [[Collective_intelligence]] · [[Complex_system]] · `Complexity,_Problem_Solving,_and_Sustainable_Societies` · `Conflict_escalation` · [[Control_theory]] · [[Coupled_human–environment_system]] · [[Cybernetics]] · [[Donella_Meadows]] · [[Doubling_time]] · [[Earth_system_science]] · `Economic_stagnation` · `Economic_system` · `Ecoregion` · [[Ecosystem]] · `Ecotourism` · [[Edsger_W._Dijkstra]] · [[Edward_Norton_Lorenz]] · `Energy_economics` · [[Eric_Trist]] · `Eutrophication` · `Evapotranspiration` · `Focused_improvement` · [[Francisco_Varela]] · `Fred_Emery_(psychologist)` · [[George_Dantzig]] · [[George_Klir]] · `Goal` · [[Gregory_Bateson]] · `Heat_capacity` · [[Heinz_von_Foerster]] · [[Howard_T._Odum]] · [[Humberto_Maturana]] · `Hunger` · `Hypoxia_(environmental)` · [[Ilya_Prigogine]] · `Industrial_wastewater_treatment` · `Information_flow_(disambiguation)` · [[Information_system]] · [[James_Grier_Miller]] · [[James_J._Kay]] · [[Jay_Wright_Forrester]] · [[Jennifer_Wilby]] · `John_Gall_(author)` · [[John_Seddon]] · `Joseph_Tainter` · [[Kathleen_Carley]] · [[Katia_Sycara]] · `Kenneth_E._Boulding` · [[Kevin_Warwick]] · `Lake` · [[Limiting_factor]] · [[List_of_systems_sciences_organizations]] · `List_of_systems_scientists` · [[Living_systems]] · [[Ludwig_von_Bertalanffy]] · [[Lydia_Kavraki]] · [[Manfred_Clynes]] · [[Manuela_M._Veloso]] · [[Margaret_Boden]] · [[Margaret_Mead]] · [[Mary_Cartwright]] · [[Mihajlo_D._Mesarovic]] · `Mike_Jackson_(systems_scientist)` · [[Multi-agent_system]] · [[Murray_Bowen]] · `Nature` · [[Negative_feedback]] · [[Nervous_system]] · [[Niklas_Luhmann]] · [[Norbert_Wiener]] · `North_American_Free_Trade_Agreement` · `Nutrient` · [[Oxygen]] · [[Peter_Senge]] · `Phytoplankton` · `Pollution` · [[Positive_feedback]] · [[Principia_Cybernetica]] · [[Qian_Xuesen]] · [[Radhika_Nagpal]] · [[Recommender_system]] · `Rule` · `Russell_L._Ackoff` · `Ruzena_Bajcsy` · [[Self-organization]] · `Social_system` · [[Sociotechnical_system]] · [[Stafford_Beer]] · [[Stephanie_Forrest]] · [[Stock_and_flow]] · [[System]] · [[System_dynamics]] · `Systemantics` · `Systemics` · `Systems_analysis` · `Systems_art` · [[Systems_biology]] · [[Systems_ecology]] · [[Systems_engineering]] · [[Systems_neuroscience]] · [[Systems_pharmacology]] · `Systems_philosophy` · `Systems_psychology` · [[Systems_science]] · [[Systems_theory]] · `Systems_theory_in_anthropology` · [[Systems_theory_in_archaeology]] · [[Systems_theory_in_political_science]] · [[Systems_thinking]] · [[Talcott_Parsons]] · `Theory_of_constraints` · `Thermocline` · `Unemployment` · [[Urban_metabolism]] · `Victor_Aladjev` · `World-systems_theory` · `Zooplankton`
## From the Real GENERATIVE library
*Twelve leverage points — placed from the Real G.E.N.E.R.A.T.I.V.E. course library (Engineering room). Source: Wikimedia Commons (via Wikipedia article media). [Details & license](https://commons.wikimedia.org/wiki/File:Symbol_portal_class.svg).*
> The twelve leverage points to intervene in a system were proposed by Donella Meadows, a scientist and system analyst who studied environmental limits to economic growth.[1] ([Wikipedia](https://en.wikipedia.org/wiki/Twelve_leverage_points))
<!-- REAL-GENERATIVE-MEDIA:END -->
> p5.js MicroSim stub · part of Systems Science · [Wikipedia source](https://en.wikipedia.org/wiki/Twelve_leverage_points)
> Relation: subfield of systems science.
## Concept summary
The twelve leverage points to intervene in a [[System|system]] were proposed by [[Donella_Meadows|Donella Meadows]], a scientist and system analyst who studied environmental limits to economic growth.
## Build checklist
- [ ] Claim it: set `status: in-progress` + `lease` + `leased_at`
- [ ] Write the child page explaining the concept (tie it back to systems science)
- [ ] Finalize parameter ranges and defaults
- [ ] Implement the p5.js sketch (drawing + control regions)
- [ ] Add caption + the learning objective on the page
- [ ] Set `status: done`
## p5.js sketch
```javascript
// MicroSim: Twelve leverage points
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render stock-and-flow; respond live.
}
```
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Back to Systems Science · Wikipedia: [Twelve leverage points](https://en.wikipedia.org/wiki/Twelve_leverage_points)
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## Semiotic profile
> *The semiotic universals this article invokes, machine-derived from the crossref — **unverified** (born so). Populated 2026-07-06 for the Systems room.*
**Universals (4):** 🟡 system (18) · 🟢 flow (10) · 🟡 science (5) · 🟢 feedback (1)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
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<!-- REAL-GENERATIVE-MEDIA:START -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Twelve_leverage_points) : [Wikitube](https://en.wikitube.io/wiki/Twelve_leverage_points)
## Previous hub tags
Tree parents: [[Control_theory]] · [[Cybernetics]] · [[Operations_research]] · [[Reliability_engineering]] · [[System_dynamics]] · [[Systems_engineering]] · [[Systems_science]] · [[Systems_theory]].
Legacy hubs: none.
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*Sources: 2 legacy notes. Minted wave 1, 2026-07-30 (v1.6 order).*