system creates the electoral conditions necessary to foster party development while a plurality system marginalizes many smaller political parties, resulting in what is known as a two-party system. In political science, Duverger's law is a principle which asserts that plurality rule elections structured within single-member districts tends to favor a two-party system. This is one of two hypotheses proposed by Duverger, the second stating that "the double ballot majority system and proportional representation tend to multipartism." Works Les partis politiques (1951) La participation des femmes à la vie politique (1955) Les finances publiques (1956) Méthodes de la science politique (1959) De la dictature (1961) Méthodes des Sciences sociales (1961) Introduction à la politique (1964) Sociologie politique (1966) La démocratie sans les peuples (1967) Institutions politiques et Droit constitutionnel (1970) Janus: les deux faces de l'Occident (1972) Sociologie de la politique (1973) L'autre côté des choses (1977) King's Mate (1978) Les orangers du lac Balaton (1980) Factors in a Two-Party and Multiparty System, in Party Politics and Pressure Groups (New York: Thomas Y. Crowell, 1972), pp. 23–32. Political Parties: Their Organization and Activity in the Modern State The Study of Politics La République des Citoyens (1982) Lettre Ouverte aux Socialistes (Collection Lettre ouverte) Modern Democracies: Economic Power Versus Political Power La Cohabitation des Français Europe des Hommes: Une Métamorphose Inachevée (1994) The Idea of Politics: the Uses of Power in Society(1966) The French Political System L'Europe dans tous ses États (1995) See also Duverger's law Micromega rule References External links Classification of political parties (in Spanish) Short biography (in French) 1917 births 2014 deaths People from Angoulême French Popular Party politicians Members of the European Parliament for Italy French political scientists French sociologists Voting theorists Academic staff of the University of Bordeaux Academic staff of the University of Paris Academic staff of the University of Poitiers Members of the Serbian Academy of Sciences and Arts Order of the Francisque recipients Grand Officiers of the Légion d'honneur French male non-fiction writers MEPs for Italy 1989–1994