Chap 4/5/6 Flashcards
Taking a holistic approach to analyzing complexity. Rather than focusing on the details of isolated problems, way of thinking allows us to see the interconnections between constituent parts and the causes and effects of action.
Systems thinking
As one part of a system changes, other parts of the system react and respond, regulating system behavior as a whole. This term is the mechanism by which the system regulates and manipulates this change. This closed chain of causal connections forms when changes in a stock affect the flows in and out of that stock. These exhibit two kinds of behavior: positive (reinforcing) and negative (balancing).
Feedback loops
These are the interconnections between elements of a system that change over time—the relationships that hold the system together.
flows
These are the elements of a system that you can see, feel, and count.
stocks
This term describes what happens in a system that is both complex and changing. Taking action in one part of this type of system yields unpredictable, erratic results, that makes solving sustainability challenges like climate change particularly difficult.
Dynamic compexity
Equilibrium occurs when a system is in balance such that changes to that system are imperceptible. Static equilibrium describes a system that is unchanging and motionless, but this type of equilibrium exists when a system is in a state of change yet the opposing forces at work are equivalent.
Dynamic Equilibrium
These are also known as positive feedback loops, and generate exponential growth or collapse at an increasing rate. This runaway behavior strengthens with each iteration.
Reinforcing loop
an increase in severe weather events, drought, changes in ocean chemistry, and rising tides.
Climate Change
These are also known as negative feedback loops, and have a stabilizing effect, creating resistance, eventually limiting growth or collapse.
balancing loops
A principle of most systems is that they have the ability to structure themselves, evolve into new structures, learn, diversify, and become increasingly complex. By loosening control, this phenomenon offers a valuable leverage point for change.
self-organization
This term refers to the various combinations of reinforcing and balancing feedback loops that commonly occur in systems. They include: Fixes that backfire or fail, Shifting the burden, Limits to growth or success, Tragedy of the commons, Accidental adversaries, Escalation, Drifting or eroding goals, Success to the successful, and Growth and underinvestment.
system archetype
Published by the Club of Rome in 1972, this was a controversial paper, authored by a team at MIT, working under Jay W. Forrester. Controversial at the time, the team used computer modeling to simulate the impact on the biosphere of continued economic and population growth. Their findings showed that the carrying capacity of the Earth could not withstand the then-current rates beyond 2100, without experiencing irreversible collapse.
Limits of growth
This is an abstract representation of a system—of something in the real world that we want to better understand—constructed in our imaginations. Cultivating the ability to think about the underlying structure and function of a system, through the use of these, is critical to successful sustainable development.
mental model
Places to intervene in a system to create change.
leverage points
This consists of the biological community along with the physical and chemical factors that make up its nonliving environment.
Ecosystem