The article aims to sketch out the main features of the political culture of the Radical Party (PR). This political culture is paradigmatic of a much broader phenomenon that has affected the politics of Western democracies since the 1970s: the critique of traditional parties in the name of a party model formed by spontaneous groupings of society; the extreme emphasis placed on individual choices in political action, and the programmatic tracing of the latter back to the former; and the call for a less ‘mediated’ relationship between citizens and institutions. Yet, this culture contained certain ingredients that would distance it from the populist forms of the twenty-first century. After grafting anti-authoritarianism onto its liberal matrix the PR identified the promotion of civil rights as the goal and battle for the transformation of the relationship between politics and the citizen. This transformation emphasised the sphere of individual freedom and the liberty to participate in community decisions, and thus implied a transformation of the ways and means of doing politics. In the late 1970s, the PR deepened its critique of parties and partitocracy and, at the same time, emphasised a supranational view of politics, eventually becoming a ‘transnational transparty’ party in 1989.