Duverger's law
Duverger's law
Winner-takes-all voting systems tend to result in only two viable parties.
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First pulled by Cheval, Nov 1, 2026
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Readers' pathsAug 2026 – Oct 2026
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Maurice Duverger
French political scientist (1917–2014).
14%
Proportional representation
Voting system that makes outcomes proportional to vote totals.
11%
First-past-the-post voting
Plurality voting system.
11%
Two-round system
Voting system.
8.6%
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Canadian political fable.
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5.3%
Ross Perot 1992 presidential campaign
American political campaign.
2%
Two-party-preferred vote
Result of election after distribution of preferences.
1.4%
Whig Party (United States)
19th-century American political party.
1.4%
United Kingdom
Country in Northwestern Europe.
1.3%
Readers come from
Share of the 1,785 readers arriving from another article
First-past-the-post voting
Plurality voting system.
13%
Third party (U.S. politics)
US political parties other than the two major parties.
11%
Maurice Duverger
French political scientist (1917–2014).
7.2%
Ranked voting
Voting systems that use ranked ballots.
2.1%
National Popular Vote Interstate Compact
U.S. agreement on presidential elections.
1.7%
Cube rule
Law regarding first-past-the-post elections.
1.6%
Effective number of parties
Concept in political party systems.
1.6%
Proportional representation
Voting system that makes outcomes proportional to vote totals.
1.2%