How did Italy’s political party system change in the early 1990s?

In the early 1990s, Italy’s political party system underwent a radical transformation, marking the end of the partitocrazia (party-dominated) era that had persisted since the post-World War II period. This shift was driven by three primary factors: the end of the Cold War, a massive wave of judicial corruption investigations, and significant electoral reforms.12

Key Drivers of Change

• End of the Cold War: The collapse of communism in the Soviet bloc undermined the ideological foundations of Italy’s two dominant parties, the Christian Democratic Party (DC) and the Italian Communist Party (PCI).12
• Corruption Scandals: The "Operation Clean Hands" (Mani Pulite) investigations, led by magistrates such as Antonio Di Pietro, exposed systemic bribery involving nearly all major political parties, particularly the DC and the Socialist Party.13
• Electoral Reform: In 1993, voters approved referenda to replace proportional representation with a system where three-fourths of parliament was elected from single-member constituencies.1

Reshaping the Political Landscape

As a result, the established parties dissolved or rebranded. The DC became the Italian Popular Party, while the PCI evolved into the Democratic Party of the Left. New forces emerged to dominate the right and center-right, including Forza Italia, the Northern League, and the National Alliance. This transition polarized the political spectrum between the left and right, effectively ending the long-standing dominance of the center.12