Transformation and Decay: the de-institutionalisation of party systems in South America

This article surveys the evolution of party systems in South America in terms of their level of institutionalisation. In recent times political competition in much of South America has become less structured by political parties proper and has moved in the direction of candidate-centred movements and electoral vehicles led by political entrepreneurs. Most countries in South America (Brazil, Chile and Uruguay are exceptions) have experienced party system de-institutionalisation during the 1990s and 2000s, as voters have systematically punished traditional parties, often rendering them marginal or forcing their disappearance. The scale of decomposition varies across cases but it has affected countries with historically well institutionalised party systems (Colombia, Venezuela) and those with inchoate party systems (Ecuador, Peru, Bolivia) alike.