The Existential Threat: Varieties of Socialism and the Origins of Electoral Systems in Early Democracies

The origins of electoral systems in early democracies have received a great deal of attention in recent years, as scholars seek to explain why at the time of suffrage expansion some countries adopted proportional representation (PR) while others chose single-member plurality (SMP). This paper offers a systematic explanation of the choice of electoral systems based on the “existential threat” posed by rising workers’ parties after suffrage expansion, that is, the extent to which these parties threatened the institutions of capitalism and liberal democracy. Original historical research offers important correctives to the dominant scholarly narrative, revealing that PR and SMP were both novel systems at the time, devised to replace the “mixed” systems that prevailed in the predemocratic period. Both, moreover, were seen as elite safeguards that, through different mechanisms, would protect right parties from the impact of suffrage expansion. Mid-range analysis of 18 historical cases reveals that the choice ultimately turned on the different strategic advantages and time horizons associated with the two systems as well as the existential threat presented by new workers’ parties.