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Duverger's law - Wikipedia

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In political science, Duverger's law holds that in political systems with only one winner (as in the U.S.), two main parties tend to emerge with minor parties typically splitting votes away from the most similar major party.[1][2] In contrast, systems with proportional representation usually have more representation of minor parties in government.[3] A two-party system is more common in a plurality voting system (also referred to as first past the post). Voters typically can cast one vote per race. Since the winner of the seat is determined by the candidate with the most votes, the development of third parties is discouraged. Maurice Duverger argued that there were two mechanisms whereby plurality voting systems lead to fewer major parties: (i) small parties are disincentivized to form because they have great difficulty winning seats or representation, and (ii) voters are wary of voting for a smaller party whose policies they actually favor because they do not want to "waste" their vot

Duverger's law - Wikipedia Jump to content From Wikipedia, the free encyclopedia Winner-takes-all voting systems tend to result in only two viable parties In political science , Duverger's law ( / ˈ d uː v ər ʒ eɪ / DOO -vər-zhay ) holds that in political systems with single-member districts and the first-past-the-post voting system , as in, for example, the United States and United Kingdom , only two powerful political parties tend to control power every election cycle. Citizens do not vote for small parties because they fear splitting votes away from the major party and allowing their oppone

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