The failure of mainstream parties and the impact of new challenger parties in France, Italy and Spain.

Political parties share a very bad reputation in most European countries. This paper provides an interpretation of this sentiment, reconstructing the downfall of the esteem in which parties were held and their fall since the post-war years up to present. In particular, the paper focuses on the abandonment of the parties' founding 'logic of appropriateness' based, on the one hand, on the ethics for collective engagement in collective environments for collective aims and, on the other hand, on the full commitment of party officials. The abandonment of these two aspects has led to a crisis of legitimacy that mainstream parties have tried to counteract in ways that have proven ineffective, as membership still declines and confidence still languishes. Finally, the paper investigates whether the new challenger parties in France, Italy and Spain have introduced organizational and behavioural changes that could eventually reverse disaffection with the political party per se. [ABSTRACT FROM AUTHOR]