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Arts & Culture

Electoral System Design and Party Fragmentation Risks

Quick fact

Countries with proportional representation often have many parties, while single-member district systems tend to favor two big parties—a phenomenon summarized by Duverger's Law.

Why this is interesting

Why do some democracies have two major parties while others juggle a dozen? The answer lies not just in voters' preferences, but in the rules of the game—the electoral system.