This paper provides an empirical analysis of the result of the referendum on constitutional reform held in Italy on 4 December 2016. The votes against (59.1%) won by a significant margin, with an unexpectedly high turnout at the polls and more than 33 million citizens voting. Using as a point of departure the polls carried out prior to and following the referendum, in which Italians said they were essentially in favour of the reform proposed by the prime minister, the essay focuses on the mistakes made by Matteo Renzi that discouraged Italians from voting Yes. These touch on all aspects of the referendum: 1) the parliamentary process, 2) its combination with electoral law, 3) institutional communication, and 4) his political analysis and strategic approach. The final section evaluates the effects of the referendum result on the Italian political system, emphasising the setback to reformism and the strengthening of the anti-system parties that support leaving the Euro (in particular the Movimento 5 Stelle).

Matteo Renzi’s eruption on to the Italian political scene is now overcoming the inertia of the Italian political system, with a highly personalised leadership style which is challenging the Democratic Party’s (Partito Democratico, PD) organisational model. Renzi’s great innovation on the Italian left is the enforcement of a post-ideological leadership which is able to attract wide support due to a vigorous style of communication and skill in the use of traditional and new media. This article analyses the rise of this new charismatic leadership and the way in which it challenged the traditional organisational model of the PD, and aims to identify the main elements that define it at national and party level.