The thesis develops an understanding of the relationship between populism and the changes in the media landscape brought about by the advent of web 2.0. Its aim is to explain the rapid emergence of the Beppe Grillo’s Five Star Movement in Italy. A contextual analysis of the structures of opportunities reveals that the key to understand the ‘success’ of 5SM lays in the fact that the political actor fully exploited the affordances of the Web 2.0, making them resonate with the ‘thin’ ideology of populism. The advent of web 2.0 can then benefit political actors employing a populist ideology in three ways; enhancing the declining trust and separation between people and the political establishment, providing a seemingly more direct form of communication with the electorate and providing a new way of constructing the ‘people’ of populism through the networks. / Graduate