Unintended Consequences Defined

Quite elegantly.

The law of unintended consequences is what happens when a simple system tries to regulate a complex system. The political system is simple, it operates with limited information (rational ignorance), short time horizons, low feedback, and poor and misaligned incentives. Society in contrast is a complex, evolving, high-feedback, incentive-driven system. When a simple system tries to regulate a complex system you often get unintended consequences.

Unintended consequences are not restricted to government regulation of society but can also happen when government tries to regulate other complex systems such as the ecosystem (e.g. fire prevention policy that reduces forest diversity and increases mass fires, dam building that destroys wet lands and makes floods more likely etc.) Unintended consequences can even happen in the attempted regulation of complex physical systems (here is a classic example involving turbulence).(Internal links omitted).