Tyranny of Small Decisions
Updated 2026-08-05
INTRODUCTION
English translation pending.
CORE DEFINITION
Formulated by Alfred Kahn, the tyranny of small decisions describes a situation in which a series of separate, individually rational choices produces a large-scale outcome that no one deliberately chose and most would reject. Each person decides to drive rather than take the train; collectively the ridership collapses and the rail service is withdrawn. The failure is aggregation rather than individual error, so remedies must operate at the level of coordination or collective rules.
SCAFFOLDING EFFECT
Reduce cognitive load
- Look at the sum: ask what the accumulation of these small choices produces overall. - Find the missing decision: identify the collective choice nobody is actually making. - Add coordination: introduce a rule or mechanism that prices the aggregate effect.
Anchor fast decisions
Each decision is made against the marginal private cost, which excludes the effect it has on everyone else's options. As small choices accumulate, the shared option they depend on deteriorates until it disappears, and it is then gone for everyone. Because no single choice appears decisive, no individual has a reason to stop, so only a coordinating rule can change the aggregate.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Tyranny_of_small_decisionsverified
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