Systems & Complexity
Break Points
Thresholds in a system where gradual changes in inputs produce sudden, qualitative changes in outputs—phase transitions, tipping points, and critical thresholds
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Systems & Complexity
Butterfly Effect
Edward Lorenz's discovery that in sensitive dynamical systems, tiny differences in initial conditions can produce vastly different outcomes—a butterfly flapping its wings in Brazil could theoretically set off a tornado i…
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Chaos Dynamics
In chaotic systems, tiny differences in starting conditions produce wildly different outcomes (the 'butterfly effect')
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Complex Adaptive Systems
Systems composed of many interacting agents that adapt their behavior based on their interactions and environment
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Creative Tension (Gap Between Vision and Current Reality)
Peter Senge's concept that genuine motivation for change arises from accurately perceiving the gap between your vision (what you want) and current reality (what exists now)
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Criticality
The state at which a system is poised at the boundary between order and chaos—where small perturbations can cascade into large-scale changes
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Cycles
The recognition that many phenomena are cyclical rather than linear—economic booms and busts, market sentiment, innovation waves, political pendulums, biological rhythms
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Delays in Feedback Loops
A process in which the outputs of a system circle back to affect that system's behavior
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Dialogue vs Discussion
David Bohm and Peter Senge's distinction between two modes of group conversation
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Double-Loop Learning
Chris Argyris's distinction between single-loop learning (adjusting actions to achieve existing goals—a thermostat adjusting temperature) and double-loop learning (questioning whether the goals themselves are correct—ask…
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Drift to Low Performance
A systems archetype where performance standards gradually decline because the reference point adjusts to current performance rather than remaining fixed at the original target
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Emergence
The phenomenon where a system exhibits properties, behaviors, and patterns that NONE of its individual components possess—the whole is genuinely different from (not just greater than) the sum of its parts
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Entropy
The second law of thermodynamics applied broadly: closed systems tend toward disorder, and maintaining order requires continuous energy input
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Equilibrium
The state of a system where opposing forces BALANCE, producing stability—the system has no net tendency to change
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Eroding Goals Archetype
A system archetype where gaps between goals and performance are closed by LOWERING THE GOAL rather than by IMPROVING PERFORMANCE—producing a gradually declining standard that feels acceptable at each step because the gap…
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Escalation Archetype
A system archetype where two parties respond to each other's actions with escalating competitive responses—each side's action is the stimulus for the other's reaction, producing a self-reinforcing spiral
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Feedback Loops
Circular causal mechanisms where a system's output loops back to influence its input—either REINFORCING (positive feedback: output amplifies input, producing exponential growth or decline) or BALANCING (negative feedback…
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Feedback Loops (and Homeostasis)
Circular causal chains where a system's output feeds back as input, either amplifying change (positive/reinforcing feedback: success breeds success, panic breeds panic) or dampening it (negative/balancing feedback: therm…
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Filling a Vacuum
The systems principle that any empty space—in markets, power structures, ecosystems, or social roles—will naturally be filled
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Fixes That Fail Archetype
Peter Senge's system archetype where a quick fix addresses the symptom of a problem but creates unintended consequences that eventually make the original problem worse
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Antifragile
Nassim Taleb's concept for systems that don't just withstand shocks but actually gain from them
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Growth and Underinvestment Archetype
Peter Senge's system archetype where initial growth generates demand for capacity expansion, but the organization fails to invest in capacity fast enough—causing service quality to degrade, which slows growth, which seem…
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Hierarchy as System Structure
Herbert Simon's insight that complex systems are universally organized hierarchically—not because hierarchy is imposed but because it EVOLVES as the most stable and efficient architecture for complex systems
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Hysteresis
A system property where the current state depends not just on current inputs but on the path taken to get there—the system's history leaves a residue
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Irreducibility
The property of a system where the behavior or function CANNOT be simplified without loss—it requires all of its components and their specific interactions
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Ladder of Inference
Chris Argyris and Peter Senge's model of how people move from observable data to action through a series of increasingly abstract inferences: select data → add meaning → make assumptions → draw conclusions → adopt belief…
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Left-Hand Column Technique
Chris Argyris's exercise where you write what was actually said in a conversation in the right column and what you were thinking but didn't say in the left column
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Leverage Points
Donella Meadows's framework identifying the places in a complex system where a small intervention can produce large, lasting change
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Limits to Growth Archetype
Peter Senge's system archetype where initial success creates a reinforcing growth loop that eventually encounters a balancing constraint—and the constraint, not the growth engine, determines the system's ultimate traject…
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Mental Models (Explicit Surfacing)
Peter Senge's discipline of bringing unconscious mental models—the assumptions, generalizations, and beliefs that shape how we understand and act in the world—into conscious awareness where they can be examined and teste…
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Personal Mastery
Peter Senge's first learning discipline: the practice of continuously clarifying and deepening personal vision, focusing energy, developing patience, and seeing reality objectively
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Power Laws in Complex Systems
The mathematical pattern where a few items account for a disproportionate share of the total—and this distribution follows a specific mathematical function (power law) rather than a bell curve
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Reinforcing Feedback Loop
A systems dynamics structure where the output of a process feeds back to AMPLIFY further change in the same direction—creating exponential growth or exponential decline
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Renormalization Group
A technique from theoretical physics for understanding how systems behave at different scales by systematically coarse-graining—zooming out and seeing which details matter and which wash out at larger scales
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Resilience
The capacity of a system to absorb disturbance, reorganize, and maintain its essential functions—distinct from robustness (resisting change) and distinct from efficiency (optimizing for known conditions)
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Rule Beating
The system dynamics phenomenon where actors find ways to comply with the letter of a rule while violating its spirit—gaming metrics, exploiting loopholes, and satisfying the measure rather than the underlying goal
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Seeking the Wrong Goal
A system archetype where the system's stated goal diverges from the goal it's actually optimizing for
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Self-Organization
The emergence of order in a system without external direction—patterns, structures, and behaviors arise from local interactions following simple rules
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Shared Vision
Peter Senge's learning discipline where a group develops a genuine, shared picture of the future they want to create—not compliance with a leader's vision but authentic collective aspiration
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Shifting the Burden Archetype
Peter Senge's system archetype where addressing a problem with a symptomatic solution reduces pressure to implement the fundamental solution—and over time, the symptomatic solution becomes the default, the fundamental so…
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Spring-loading
A strategic pattern of building up potential energy—resources, capabilities, relationships, or advantages—before releasing it for maximum impact
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Stocks and Flows
A fundamental systems thinking concept: stocks are accumulations (inventory, money, knowledge, trust) and flows are the rates of change (inflows adding to stocks, outflows depleting them)
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Structural Conflict
Robert Fritz's concept that most people are caught between two competing internal structures: the desire to create what they want and a belief that they can't have it or don't deserve it
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Suboptimization
The systems failure where optimizing a SUBSYSTEM degrades the performance of the WHOLE SYSTEM—because what's optimal for the part isn't optimal for the whole
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Success to the Successful Archetype
Peter Senge's system archetype where initial success creates advantages that produce more success—a self-reinforcing dynamic where the winning party accumulates advantages while the losing party is progressively disadvan…
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System Archetypes
Peter Senge's catalogue of recurring system behavior patterns that appear across different contexts—templates of dynamic behavior that repeat because the underlying causal structure repeats
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Systems Thinking
Seeing the world as interconnected wholes rather than isolated parts
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Systems Thinking as Fifth Discipline
Peter Senge's framing of systems thinking as the integrative discipline that makes the other four organizational learning disciplines (personal mastery, mental models, shared vision, team learning) effective
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