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No. 345 · Fixing problems · Military and War

Domino Effect

One small fall can set off a chain that topples far bigger things.

The Domino Effect describes how a single small event can set off a growing chain of consequences. When Hungary opened its border with Austria in 1989, it helped trigger the fall of the Berlin Wall, and the iPhone set off cascades across software, advertising, payments, and transport.

Look for the smallest first domino that can set bigger change in motion, like simply putting on your running shoes each morning. Map possible chain reactions, good and bad, before acting. Once a positive cascade starts, reinforce it and use its momentum to drive further change.

In the Almanac

“Hungary opens the border”, 1989 · “The iPhone”, 2007–2010

Both stories in full, three ways to use it and where it misleads.

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Domino Effect

Questions

What is Domino Effect?

The Domino Effect describes how a single small event can set off a growing chain of consequences. When Hungary opened its border with Austria in 1989, it helped trigger the fall of the Berlin Wall, and the iPhone set off cascades across software, advertising, payments, and transport.

How do you use Domino Effect?

Look for the smallest first domino that can set bigger change in motion, like simply putting on your running shoes each morning. Map possible chain reactions, good and bad, before acting. Once a positive cascade starts, reinforce it and use its momentum to drive further change.

When does Domino Effect matter?

Domino Effect is one of the 40 mental models for fixing problems, the situations where you ask: Why does this keep going wrong, and how do I fix it for good? Within that, it belongs to “How problems spread”, alongside Broken Windows Theory, Chain Reaction and Containment.

What is an example of Domino Effect?

Two stories show it at work: Hungary opens the border (1989) and The iPhone (2007–2010). Both are told in full in The Mental Models Daily Almanac, which has two stories for each of its 365 models.

Which mental models are related to Domino Effect?

Second-Order Thinking, Butterfly Effect and Slippery Slope. Domino Effect itself comes from military and war.