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Arrow's Impossibility Theorem

Arrow's Impossibility Theorem

Update: 2020-12-04
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Above all, everyone wants voting to be fair. What does fair mean and how can we measure it? Kenneth Arrow posited a simple set of conditions that one would certainly desire in a voting system. For example, unanimity - if everyone picks candidate A, then A should win!

Yet surprisingly, under a few basic assumptions, this theorem demonstrates that no voting system exists which can satisfy all the criteria.

This episode is a discussion about the structure of the proof and some of its implications.

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Arrow's Impossibility Theorem

Arrow's Impossibility Theorem