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A system is a set of things – people, cells, molecules, or whatever – interconnected in such a way that they produce their own pattern of behavior over time. [...] The system, to a large extent, causes its own behavior!

— Donella Meadows Thinking in Systems: A Primer (2008)

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More quotes by Donella Meadows

Models can easily become so complex that they are impenetrable, unexaminable, and virtually unalterable.

Meadows (1980)

The bounded rationality of each actor in a system may not lead to decisions that further the welfare of the system as a whole.

Thinking in Systems: A Primer (2008)

If you want to understand the deepest malfunctions of systems, pay attention to the rules and to who has power over them.

Thinking in Systems: A Primer (2008)

Dynamic systems studies usually are not designed to predict what will happen. Rather, they're designed to explore what would happen, if a number of driving factors unfold in a range of different ways.

Thinking in Systems: A Primer (2008)

Calculating how much carbon is absorbed by which forests and farms is a tricky task, especially when politicians do it.

Meadows (2000)

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Quote text and notes from Wikiquote: Donella Meadows (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.