Unintended Consequences of Messing with Complex Systems

Ecosystems are complex. When you try to intervene and “fix” one discrete part of an interconnected ecosystem, you’ll likely incur unintended and unpredictable consequences elsewhere. An ecosystem can be a biological community; it can also refer to a large company or even an entire economy. I love Arnold Kling’s metaphor of a country’s economy being like a rainforest. It’s a metaphor that should humble any policymaker who thinks he can simply turn a knob here or a knob there to shape economic outcomes.

In a recent episode of Econtalk on free market environmentalism, there’s an interesting story about wolves in Yellowstone. When wolves were taken out of Yellowstone park, all sorts of weird things happened. A very cool 5 minute video summary (with some beautiful imagery) explains.

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